Physics equations/15-Thermodynamics/Q:heatEngine

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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