This document contains a thermodynamics tutorial with 9 questions covering topics like volume, density, specific gravity, mass, heat, work, and other thermodynamic concepts. It provides the questions, equations, values, and step-by-step workings to solve each problem. Tables are included to organize the relevant variables, units, and calculated values for each question. The document aims to help students learn and practice applying thermodynamic principles to different scenarios.

1. Thermodynamics
Tutorial 1
Dr. SUN Weimeng
swe3@np.edu.sg
Office no.:6460 8342

2. Question 1
• The volume of the fluid in the storage tank
• The density of the fluid in the storage tank
• The specific gravity of the fluid in the storage tank

3. Question 2
• The volume of the helium in the balloon
• The mass of the helium in the balloon

4. Question 3
• The volume of the bottle
• The density of the fluid
• The specific gravity of the fluid

5. Question 4
1 2 12
2 1 12 12
12 2 1 12
425 , 210 , 98
210 425 98 117
U KJ U KJ W KJ
U U Q W
Q U U W
kJ
Cooling
  
  
  
    

6. Question 5
12 2 1
2 1 12 12
12 12 2 1
625 , 1350
( )
625 1350 725
Q KJ U U U KJ
U U Q W
W Q U U
KJ
Expansion
      
  
  
   

7. Question 6
12
12
2 1 12 12
12
2 1 12 12
280
) 0
280 0 280 0
) 325
280 325 45 0
Q KJ
a W
U U Q W KJ
increase
b W KJ
U U Q W KJ
decrease


      

       

8. Question 7
2 2 3
1 1 1
1
2 2 3
2 2 2
2
1 2
2
1 1 1 1
2 2 2 2
15 15 10 / , 0.2029 / , 2952 /
30 /
1.5 1.5 10 / , 1.286 / , 2580 /
100 /
0.5 / , 20 , 28 /
2952 15 10 0.2029 3256.35 /
out
p bar kN m v m kg u kJ kg
c m s
p bar kN m v m kg u kJ kg
c m s
m kg s Z Z m Q kJ s
h u p v kJ kg
h u p v
    

    

   
      
   2
2 2
1 2
1 21 1 2 2
2 2
1 2
1 21 1 2 2
2 2
1 2
1 2 1 2
3
2580 1.5 10 1.286 2772.9 /
( ) ( )
2 2
( ) ( )
2 2
( ) ( ) ( )
2 2
0.5 (3256.35 2772.9) 10 0
outinin out
out out
out
kJ kg
c c
Q W m h gZ Q W m h gZ
c c
W m h gZ m h gZ Q
c c
m h h mg Z Z m Q
   
        
       
      
    
2 2
3
3
30 100
.5 9.81 20 0.5 ( ) 28 10
2
241725 98.1 2275 28 10
211.548 /kJ s

     
    


9. Question 8
1 2 2 1 1 2
2 2
1 2
1 21 1 2 2
2 2
1 2
1 21 2
2 2
1 2
1 2
0.65 / , 150 / , 60 / , ( ) 345 / , 60 /
( ) ( )
2 2
( ) ( )
2 2
( ) ( )
2 2
0.65 34
out
outinin out
out out
out
m kg s c m s c m s h h h h kJ kg Q kJ s
c c
Q W m h gZ Q W m h gZ
c c
W m h m h Q
c c
m h h m Q
         
        
     
    
 
2 2
150 60
5 0.65 ( ) 60
2
224.25 6.1425 60
170.39 /kJ s

  
  


10. Question 9
1 1
2 2
2 2
1 2
1 21 1 2 2
2 2
1 2
1 21 2
2 2
1 2
1 2
1.8 / , 120 / , 3250 /
30 / , 1630 / , 200 /
) ( ) ( )
2 2
( ) ( )
2 2
( ) ( )
2 2
1.8 (
out
outinin out
out out
out
m kg s c m s h kJ kg
c m s h kJ kg Q kJ s
c c
a Q W m h gZ Q W m h gZ
c c
W m h m h Q
c c
m h h m Q
  
  
        
     
    
 
2 2
3 3
2
1
120 30
3250 1630) 10 1.8 ( ) 200 10
2
2916000 12150 200000
2728150 / 2728.15 /
)
0.14 1.8
0.0021
120
J s kJ s
Ac
b V
m
V m
A m
c

     
  
 


   

11. Thank you
Q & A