Question:easy
Which of the following processes uses the total heat absorbed by system to perform work on the surrounding?
Which of the following processes uses the total heat absorbed by system to perform work on the surrounding?
Show Hint
Use the first law and find the process in which the internal energy change is zero.
Updated On: Nov 12, 2026
- Adiabatic
- Isothermal
- Isochoric
- Isobaric
Show Solution
The Correct Option is B
Solution and Explanation
Step 1: Write the Condition
All heat absorbed goes to work means $q=-w$, so $\Delta U=0$.
Step 2: Match to Processes
Only a constant temperature process keeps $\Delta U=0$ for an ideal gas.
Step 3: Conclusion
So the process is isothermal.
Final Answer:
The isothermal process uses all absorbed heat to do work. \[ \boxed{\text{(B) }\text{Isothermal}} \]
All heat absorbed goes to work means $q=-w$, so $\Delta U=0$.
Step 2: Match to Processes
Only a constant temperature process keeps $\Delta U=0$ for an ideal gas.
Step 3: Conclusion
So the process is isothermal.
Final Answer:
The isothermal process uses all absorbed heat to do work. \[ \boxed{\text{(B) }\text{Isothermal}} \]
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