# Physics equations/15-Thermodynamics/Q:heatEngine

All questions refer to this PV diagram:

1 A 1241 heat cycle uses 2.8 moles of an ideal gas. The pressures and volumes are: P1= 1.4 kPa, P2= 2.8 kPa. The volumes are V1= 2.8m3 and V4= 5.1m3. How much work is done in in one cycle?

 a) 5.09 x 102 J b) 1.61 x 103 J c) 5.09 x 103 J d) 1.61 x 104 J e) 5.09 x 104 J

2 A 1241 heat cycle uses 2.6 moles of an ideal gas. The pressures and volumes are: P1= 3 kPa, P2= 5.9 kPa. The volumes are V1= 2.5m3 and V4= 3.6m3. How much work is involved between 1 and 4?

 a) 3.3 x 102 J b) 1.04 x 103 J c) 3.3 x 103 J d) 1.04 x 104 J e) 3.3 x 104 J

3 A 1241 heat cycle uses 2.1 moles of an ideal gas. The pressures and volumes are: P1= 1.2 kPa, P2= 4.1 kPa. The volumes are V1= 3.1m3 and V4= 4.3m3. How much work is involved between 2 and 4?

 a) 1.01 x 103 J b) 3.18 x 103 J c) 1.01 x 104 J d) 3.18 x 104 J e) 1.01 x 105 J

4 A 1241 heat cycle uses 1.4 moles of an ideal gas. The pressures and volumes are: P1= 2.2 kPa, P2= 4 kPa. The volumes are V1= 1.4m3 and V4= 3.3m3. What is the temperature at step 4?

 a) 1.97 x 102 K b) 6.24 x 102 K c) 1.97 x 103 K d) 6.24 x 103 K e) 1.97 x 104 K