176. A fixed amount of an ideal monatomic gas follows the cycle shown in the figure below. If the gas absorbs $1500\,\text{J}$ of heat during process $ab$, how many joules of internal energy does it gain during process $ca$? \begin{minipage}{0.35\textwidth} [Figure: P-V diagram showing a cycle with points a, b, c. The x-axis is V with values $V_1$ and $4V_1$, the y-axis is P with values $P_1$ and $2P_1$. Point a is at $(V_1, P_1)$, point b is at $(4V_1, P_1)$, and point c is at $(V_1, 2P_1)$.] \end{minipage} \begin{minipage}{0.55\textwidth}
[(1)] $1500$
[(2)] $1800$
[(3)] $2100$
[(4)] $2400$
\end{minipage}
\textbf{176.} A fixed amount of an ideal monatomic gas follows the cycle shown in the figure below. If the gas absorbs $1500\,\text{J}$ of heat during process $ab$, how many joules of internal energy does it gain during process $ca$?
\begin{minipage}{0.35\textwidth}
\textit{[Figure: P-V diagram showing a cycle with points a, b, c. The x-axis is V with values $V_1$ and $4V_1$, the y-axis is P with values $P_1$ and $2P_1$. Point a is at $(V_1, P_1)$, point b is at $(4V_1, P_1)$, and point c is at $(V_1, 2P_1)$.]}
\end{minipage}
\hfill
\begin{minipage}{0.55\textwidth}
\begin{itemize}
\item[(1)] $1500$
\item[(2)] $1800$
\item[(3)] $2100$
\item[(4)] $2400$
\end{itemize}
\end{minipage}
\vspace{1em}