Question

The correct option for free expansion of an ideal gas under adiabatic condition is:
A \(q=0, \Delta T=0\) and \(w=0\)
B \(q=0, \Delta T<0\) and \(w>0\)
c \(q<0, \Delta T=0\) and \(w=0\)
D \(q>0, \Delta T>0\) and \(w>0\)

Answer 1

Solution:
For free expansion of ideal gas \(P_{\text {ext }}=0\)
$$
\begin{aligned}
&W_{p v}=0 \\
&q=0 \text { (adiabatic process) } \\
&\Delta E=q+w \\
&\Delta E=0 \\
&\Delta E=n C_{v m} \Delta T=0 \\
&q=0, \Delta \mathbf{T}=0, w=0
\end{aligned}
$$

Answer 2

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