Visiontree has successful partnerships with SAP customers, leading independent software vendors, systems integrators, management consultants, and other SAP technology, service, business object, hosting, and education partners. They also work with large global IT organizations and through business associate agreements on select SAP projects.
There are several types of computers including supercomputers, mainframes, and mini-computers which are used to process large amounts of information for things like weather prediction, satellite images, and military scenarios. Personal computers, also known as PCs, are smaller and less powerful and are used in homes, schools, and small businesses. There are desktop, portable, and hand-held personal computers. A network connects computers together using wires or wireless to share hardware and information. Computers have two basic parts - hardware which are the tangible parts like the case, CPU, monitor, and storage devices; and software which are the programs that tell the computer what to do like operating systems and applications.
Visiontree has successful partnerships with SAP customers, leading independent software vendors, systems integrators, management consultants, and other SAP technology, service, business object, hosting, and education partners. They also work with large global IT organizations and through business associate agreements on select SAP projects.
The document describes a computer as a programmable machine designed to automatically carry out arithmetic or logical operations. It discusses how the first computer was developed based on Joseph Marie Jacquard's invention of the Jacquard loom, which used punched cards to control patterns in textile weaving. This was an early form of programmability. The first computers were large machines found at universities. Computers now allow people to write, edit, and share documents, communicate with others worldwide, enjoy music, and create presentations.
The Morpheus Group is a complete business solutions provider specializing in process and cultural change, recruitment, consulting, and training. They recruit permanent and interim change managers, lean sigma professionals, and financial services professionals. Their recruitment team delivers high caliber professionals to banking, finance, technology, and consulting clients undergoing transformation. Morpheus prides itself on understanding its clients' industries and delivering customized solutions, as well as providing market insight and advice beyond recruitment.
Visiontree has successful partnerships with SAP customers, leading independent software vendors, systems integrators, management consultants, and other SAP technology, service, business object, hosting, and education partners. They also work with large global IT organizations and through business associate agreements on select SAP projects.
There are several types of computers including supercomputers, mainframes, and mini-computers which are used to process large amounts of information for things like weather prediction, satellite images, and military scenarios. Personal computers, also known as PCs, are smaller and less powerful and are used in homes, schools, and small businesses. There are desktop, portable, and hand-held personal computers. A network connects computers together using wires or wireless to share hardware and information. Computers have two basic parts - hardware which are the tangible parts like the case, CPU, monitor, and storage devices; and software which are the programs that tell the computer what to do like operating systems and applications.
Visiontree has successful partnerships with SAP customers, leading independent software vendors, systems integrators, management consultants, and other SAP technology, service, business object, hosting, and education partners. They also work with large global IT organizations and through business associate agreements on select SAP projects.
The document describes a computer as a programmable machine designed to automatically carry out arithmetic or logical operations. It discusses how the first computer was developed based on Joseph Marie Jacquard's invention of the Jacquard loom, which used punched cards to control patterns in textile weaving. This was an early form of programmability. The first computers were large machines found at universities. Computers now allow people to write, edit, and share documents, communicate with others worldwide, enjoy music, and create presentations.
The Morpheus Group is a complete business solutions provider specializing in process and cultural change, recruitment, consulting, and training. They recruit permanent and interim change managers, lean sigma professionals, and financial services professionals. Their recruitment team delivers high caliber professionals to banking, finance, technology, and consulting clients undergoing transformation. Morpheus prides itself on understanding its clients' industries and delivering customized solutions, as well as providing market insight and advice beyond recruitment.
The document describes Bal Samand Lake Palace & Garden Retreat in Jodhpur, India. It is a historic palace built in red sandstone overlooking Bal Samand Lake. It offers luxury accommodations surrounded by gardens and offers activities like golf, hiking trails and cultural experiences. The palace is owned by the Royal Family of Jodhpur and aims to provide a heritage experience for visitors.
The document provides a summary of the author's career and qualifications. It includes 3 pages of correspondence demonstrating positive relationships with clients and coworkers. It also includes certificates and marks showing the author's commitment to ongoing professional development and training. The author states they strive to maintain up-to-date knowledge of community resources to best support clients in achieving their goals.
11. Balance the following equations: (a) H 2 O 2 + Fe 2+ Fe 3+ + H 2 O (in acidic solution) Oxidation: Fe 2+ Fe 3+ Reduction: H 2 O 2 H 2 O Balancing the second equation for O and H gives: 2H + + H 2 O 2 2H 2 O Balancing both equations for charge with electrons: Fe 2+ Fe 3+ + e - 2H + + H 2 O 2 + 2e - 2H 2 O Multiply the first half-reaction by 2 to equalize charge. Conbine both equations to give: 2 Fe 3+ + 2H + + H 2 O 2 2Fe 3+ + 2H 2 O
12. Balancing both equations for O and H gives: CN - + H 2 O CNO - + 2H + MnO 4 - + 4H + MnO 2 + 2H 2 O Balancing both equations for charges CN - + H 2 O CNO - + 2H + + 2e- MnO 4 - + 4H + + 3e - MnO 2 + 2H 2 O 2MnO 4 - + 3CN - + H 2 O 2MnO 2 + 3CNO - + 2OH - We obtain: 3CN - + 3H 2 O 3CNO - + 6H + 2MnO 4 - + 8H + 2MnO 2 + 4H 2 O 2MnO 4 - + 3CN - + 2H + 2MnO 2 + 3CNO - + H 2 O (b) CN - + MnO 4 - CNO - + MnO 2 (in basic solution) Oxidation: CN - CNO - Reduction: MnO 4 - MnO 2
16. ความต่างศักย์ของเซลล์ไฟฟ้าเคมี Zn ( s ) | Zn 2+ (1 M ) || H + (1 M ) | H 2 (1 atm) | Pt ( s ) 2e - + 2H + (1 M ) H 2 (1 atm ) Zn ( s ) Zn 2+ (1 M ) + 2e - Anode (oxidation): Cathode (reduction): Zn ( s ) + 2H + (1 M ) Zn 2+ + H 2 (1 atm )
17. ศักย์ไฟฟ้ามาตรฐาน Standard reduction potential (E 0 ) เป็นศักย์ไฟฟ้าที่เกิดขึ้นจากปฏิกิริยารีดักชันที่ขั้วอิเล็กโทรด ณ ความเข้มข้นสารเป็น 1 M และความดันแก๊สเป็น 1 atm E 0 = 0 V Standard Hydrogen Electrode (SHE) ปฏิกิริยารีดักชันของโปรตอน 2e - + 2H + (1 M ) H 2 (1 atm )
18. ศักย์ไฟฟ้ามาตรฐาน Zn ( s ) | Zn 2+ (1 M ) || H + (1 M ) | H 2 (1 atm) | Pt ( s ) E 0 = 0.76 V cell Standard emf (E 0 ) cell 0.76 V = 0 - E zn /Zn 0 2+ E Zn /Zn = -0.76 V 0 2+ Zn 2+ (1 M ) + 2e - Zn E 0 = -0.76 V E 0 = E H /H - E Zn /Zn cell 0 0 + 2+ 2 E 0 = E cathode - E anode cell 0 0
19. ศักย์ไฟฟ้ามาตรฐาน Pt ( s ) | H 2 (1 atm ) | H + (1 M ) || Cu 2+ (1 M ) | Cu ( s ) Anode (oxidation): Cathode (reduction): 2e - + Cu 2+ (1 M ) Cu (s) H 2 (1 atm ) 2H + (1 M ) + 2e - H 2 (1 atm ) + Cu 2+ (1 M ) Cu ( s ) + 2H + (1 M ) E 0 = E cathode - E anode cell 0 0 E 0 = 0.34 V cell E cell = E Cu /Cu – E H /H 2+ + 2 0 0 0 0.34 = E Cu /Cu - 0 0 2+ E Cu /Cu = 0.34 V 2+ 0
20.
21. เซลล์ไฟฟ้าเคมีที่ประกอบด้วย Cd electrode ในสารละลาย 1.0 M Cd(NO 3 ) 2 และ Cr electrode ในสารละลาย 1.0 M Cr(NO 3 ) 3 มีค่าศักย์ไฟฟ้ามาตรฐานเป็นเท่าไร ? Cd is the stronger oxidizer Cd will oxidize Cr Anode (oxidation): Cathode (reduction): x 2 x 3 Cd 2+ ( aq ) + 2e - Cd ( s ) E 0 = -0.40 V Cr 3+ ( aq ) + 3e - Cr ( s ) E 0 = -0.74 V 2e - + Cd 2+ (1 M ) Cd (s) Cr (s) Cr 3+ (1 M ) + 3e - 2Cr ( s ) + 3Cd 2+ (1 M ) 3Cd ( s ) + 2Cr 3+ (1 M ) E 0 = E cathode - E anode cell 0 0 E 0 = -0.40 – (-0.74) cell E 0 = 0.34 V cell
22. การเกิดขึ้นได้เองของปฏิกิริยารีดอกซ์ G = - nFE cell n = จำนวนโมลของอิเล็กตรอนที่เกี่ยวข้องในปฏิกิริยา = 96,500 C/mol G 0 = - RT ln K G 0 = - nFE cell 0 F = 96,500 J V • mol = - nFE cell 0 E cell 0 = RT nF ln K (8.314 J/K •mol)(298 K) n (96,500 J/V •mol) ln K = = 0.0257 V n ln K E cell 0 = 0.0592 V n log K E cell 0
24. Oxidation: Reduction: หาค่าคงที่สมดุลของปฏิกิริยาต่อไปนี้ที่ 25 0 C Fe 2+ ( aq ) + 2Ag ( s ) Fe ( s ) + 2Ag + ( aq ) n = 2 K = 1.23 x 10 -42 2e - + Fe 2+ Fe 2Ag 2Ag + + 2e - = 0.0257 V n ln K E cell 0 E 0 = -0.44 – (0.80) E 0 = -1.24 V 0.0257 V x n E 0 cell exp K = 0.0257 V x 2 -1.24 V = exp E 0 = E Fe /Fe – E Ag /Ag 0 0 2+ +
25. ผลของความเข้มข้นต่อค่าความต่างศักย์ของเซลล์ไฟฟ้า G = G 0 + RT ln Q G = - nFE - nFE = - nFE 0 + RT ln Q Nernst equation ที่อุณหภูมิ 298 G 0 = - nFE 0 E = E 0 - ln Q RT nF - 0.0257 V n ln Q E 0 E = - 0.0592 V n log Q E 0 E =
26. ปฏิกิริยาต่อไปนี้เกิดขึ้นเองได้หรือไม่ที่อุณหภูมิ 25 0 C เมื่อ [Fe 2+ ] = 0.60 M และ [Cd 2+ ] = 0.010 M ? Fe 2+ ( aq ) + Cd ( s ) Fe ( s ) + Cd 2+ ( aq ) Oxidation: Reduction: n = 2 E = 0.013 E > 0 Spontaneous 2e - + Fe 2+ 2Fe Cd Cd 2+ + 2e - E 0 = -0.44 – (-0.40) E 0 = -0.04 V E 0 = E Fe /Fe – E Cd /Cd 0 0 2+ 2+ - 0.0257 V n ln Q E 0 E = - 0.0257 V 2 ln -0.04 V E = 0.010 0.60
27. แบทเทอรี่ Anode: Cathode: Leclanch é cell Dry cell Zn (s) Zn 2+ ( aq ) + 2e - 2NH 4 ( aq ) + 2MnO 2 ( s ) + 2e - Mn 2 O 3 ( s ) + 2NH 3 ( aq ) + H 2 O ( l ) + Zn ( s ) + 2NH + 4 ( aq ) + 2MnO 2 ( s ) Zn 2+ ( aq ) + 2NH 3 ( aq ) + H 2 O ( l ) + Mn 2 O 3 ( s )
28. แบทเทอรี่ Anode: Cathode: Mercury Battery Zn(Hg) + 2OH - ( aq ) ZnO ( s ) + H 2 O ( l ) + 2e - HgO ( s ) + H 2 O ( l ) + 2e - Hg ( l ) + 2OH - ( aq ) Zn(Hg) + HgO ( s ) ZnO ( s ) + Hg ( l )
29. แบทเทอรี่ Anode: Cathode: Lead storage battery PbO 2 ( s ) + 4H + ( aq ) + SO 2- (aq ) + 2e - PbSO 4 ( s ) + 2H 2 O ( l ) 4 Pb (s) + SO 2- ( aq ) PbSO 4 ( s ) + 2e - 4 Pb ( s ) + PbO 2 ( s ) + 4H + ( aq ) + 2SO 2- ( aq ) 2PbSO 4 ( s ) + 2H 2 O ( l ) 4
31. แบทเทอรี่ fuel cell เป็นเซลล์ไฟฟ้าเคมี ของปฏิกิริยาการเผาไหม้ ซึ่งมีการเติมรีเอเจนต์ตลอดเวลาเพื่อให้เซลล์ทำงาน Anode: Cathode: O 2 ( g ) + 2H 2 O ( l ) + 4e - 4OH - ( aq ) 2H 2 ( g ) + 4OH - ( aq ) 4H 2 O ( l ) + 4e - 2H 2 ( g ) + O 2 ( g ) 2H 2 O ( l )
37. เมื่อผ่านกระแสไฟฟ้า 0.452 A เป็นเวลา 1.5 ชั่วโมง ลงในปฏิกิริยาอิเล็กโทรไลซิสของ CaCl 2 จะ ทำ ให้เกิด Ca กี่กรัม ? Anode: Cathode: = 0.0126 mol Ca = 0.50 g Ca Ca 2+ ( l ) + 2e - Ca ( s ) 2Cl - ( l ) Cl 2 ( g ) + 2e - Ca 2+ ( l ) + 2Cl - ( l ) Ca ( s ) + Cl 2 ( g ) 2 mole e - = 1 mole Ca mol Ca = 0.452 C s x 1.5 hr x 3600 s hr 96,500 C 1 mol e - x 2 mol e - 1 mol Ca x