First slide

Thermodynamic processes

Question

When heat is given to a gas in an isothermal change, the result will be

Moderate

A

External work done
B

Rise in temperature
C

Increase in internal energy
D

External work done and also rise in temp.

Solution

In isothermal change, temperature remains constant, Hence $ΔU = 0$ .
Also from $ΔQ = ΔU + ΔW \Rightarrow ΔQ = ΔW$

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