Question 62: Thermodynamics & KTG

Question

If $$150 \mathrm{~J}$$ of heat is added to a system and the work done by the system is $$110 \mathrm{~J}$$, then change in internal energy will be

Accepted Answer

From the first law of thermodynamics, if an amount of heat $$Q$$ is given to a system, a part of it is used in increasing the internal energy $$\Delta U$$ of the system and the rest in doing work $$W$$ by the system.
$$\begin{aligned}
& 	herefore \quad Q=\Delta U+W \
& \Rightarrow \Delta U=Q-W \Rightarrow \Delta U=150-110 \
& =40 \mathrm{~J} \
\end{aligned}$$

Answer

40 J

Answer

110 J

Answer

150 J

Answer

260 J

Thermodynamics & KTG

If $150 \mathrm{~J} of heat is added to a system and the work done by the system is 110 \mathrm{~J}$, then change in internal energy will be

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