SATHEE: Heat and Thermodynamics 5 Question 21

Heat and Thermodynamics 5 Question 21

22. An ideal gas is taken through the cycle $A \to B \to C \to A$ , as shown in the figure. If the net heat supplied to the gas in the cycle is $5 J$ , the work done by the gas in the process $C \to A$ is

(2002, 2M)

(a) $- 5 J$

(b) $- 10 J$

(d) $- 20 J$

Show Answer

Answer:

Correct Answer: 22. (a)

Solution:

$Δ W_{A B} = p Δ V = (10) (2 - 1) = 10 J$

$Δ W_{B C} = 0$

$($ as $V =$ constant $)$

From first law of thermodynamics

$\begin{aligned} Δ Q & = Δ W + Δ U \\ Δ U & = 0 (process A B C A is cyclic) \\ ∴ Δ Q & = Δ W_{A B} + Δ W_{B C} + Δ W_{C A} \\ ∴ Δ W_{C A} & = Δ Q - Δ W_{A B} - Δ W_{B C} \\ = 5 - 10 - 0 = - 5 J \end{aligned}$

Heat and Thermodynamics 5 Question 21

22. An ideal gas is taken through the cycle $A \to B \to C \to A$ , as shown in the figure. If the net heat supplied to the gas in the cycle is $5 J$ , the work done by the gas in the process $C \to A$ is

Answer:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

Heat and Thermodynamics 5 Question 21

22. An ideal gas is taken through the cycle A→B→C→A, as shown in the figure. If the net heat supplied to the gas in the cycle is 5J, the work done by the gas in the process C→A is

Answer:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

Menu

22. An ideal gas is taken through the cycle $A \to B \to C \to A$ , as shown in the figure. If the net heat supplied to the gas in the cycle is $5 J$ , the work done by the gas in the process $C \to A$ is