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Boyle’s law
Boyle’s law
Boyle’s law
Boyle’s law
Boyle’s law
Boyle’s law
Boyle’s law
Boyle’s law
Boyle’s law
Boyle’s law
Boyle’s law
Boyle’s law
Boyle’s law
Boyle’s law
Boyle’s law
Boyle’s law
Boyle’s law
Boyle’s law
Boyle’s law
Boyle’s law
Boyle’s law
Boyle’s law
Boyle’s law
Boyle’s law
Boyle’s law
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Boyle’s law

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Do not plagiarize ..

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  • 1. BOYLE’S LAW NEXT
  • 2. Guides : NEXT – Next BACK – Back ACT - Activity BACK NEXT
  • 3. BOYLE’S LAW states that if the temperature is constant, as the pressure of the gas increases , the volume of a contained gas decreases. BACK NEXT
  • 4. Do you know him ? YES NO
  • 5. Robert Boyle is an English chemist that was the first to determine the quantitative relationship. BACK NEXT
  • 6. What is Boyle’s Law ? • Boyle’s Law is one of the laws in physics that concern the behaviour of gases • When a gas is under pressure it takes up less space: • The higher the pressure, the smaller the volume • Boyles Law tells us about the relationship between the volume of a gas and its pressure at a constant temperature • The law states that pressure is inversely proportional to the volume BACK NEXT
  • 7. How can we write Boyle’s Law as a formula? • Pressure is inversely proportional to the volume and can be written as: • Pressure a 1/volume P=pressure in N/m2 V=volume in dm3 (litres) k=constant BACK • This is more usually written as: • Pressure = constant volume • PV=k • P1V1=P2V2 NEXT
  • 8. Result of the experiment Pressure p Volume V PxV 1 40 44 2 26 52 3 20 60 4 17 68 What can you observe from this result ? BACK NEXT
  • 9. RESULT OF THE EXPERIMENT • The pressure x volume for each set of results remains constant • This is called Boyle’s Law • For a fixed mass of gas, at constant temperature, pV = constant or P1 x V1 = P2 x V2 BACK NEXT
  • 10. What can you conclude according to the result of the experiment ? BACK NEXT
  • 11. • Curved lines are hard to recognise, so we plot the volume against the reciprocal of pressure (ie. 1/p) • This time the points lie close to a straight line through the origin. • This means volume is directly proportional to 1/pressure or • volume is inversely proportional to pressure BACK NEXT
  • 12. EXAMPLE PROBLEMS BACK NEXT
  • 13. A deep sea diver is working at a depth where the pressure is 3.0 atmospheres. He is breathing out air bubbles. The volume of each air bubble is 2 cm3. At the surface the pressure is 1 atmosphere. What is the volume of each bubble when it reaches the surface? BACK NEXT
  • 14. Follow these steps so that you can answer the problem easily : 1.) List first the given. P1 – 3.0 atm V1 – 2cm3 P2 – 1 atm
  • 15. Follow these steps so that you can answer the problem easily : 2.) Find the missing given. V2
  • 16. Follow these steps so that you can answer the problem easily : 3.) Write the formula. P1 x V1 = P2 x V2 V 2 = P1 x V 1 P2
  • 17. Follow these steps so that you can answer the problem easily : 4.) Solve the problem now. V 2 = P1 x V 1 P2 V2 = 3.0 x 2 1.0
  • 18. Follow these steps so that you can answer the problem easily : 5.) Write the answer now. V2 = 6cm3 BACK ACT
  • 19. Answer the following questions orally. Who is the chemist determine the quantitative relationship between the volume and pressure of the gasses ? State the Boyle’s Law. BACK NEXT
  • 20. ASSESSMENT BACK NEXT
  • 21. Answer this problem ( 5 pts. ) and follow the steps to solve this problem : A balloon with a volume of 2.0 L is filled with a gas at 3 atmospheres. If the pressure is reduced to 0.5 atmospheres without a change in temperature, what would be the volume of the balloon? BACK NEXT
  • 22. BY : TRISHA RACRAQUIN III-GOLD

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