Question

A sample consisting of 1 mol of mono-atomic gas $(C_V=\frac{3}{2}R)$is taken through the cycle as shown.

$\Delta U$ for the process $(1\to 2)$ is

• A. $Zero$
• B. $+3.40\times {10}^{3}J$
• C. $-3.40J$
• D. $-3.40\times {10}^{3}J$

Answer 1

The correct option is B $+3.40\times {10}^{3}J$

$P=1atm{V}_1=22.44L,V_2=44.88L{C}_V=\frac{3}{2}R\Delta T=T_2-T_1=546-273K=3.40\times {10}^{3}J$