7 RBTS PAPER
164185
Two isothermals are drawn for temperature \(T_1\) \& \(T_2\) for an ideal gas. Which statement is true :
1 \(\Delta \mathrm{U}_{\mathrm{ab}}>\Delta \mathrm{U}_{\mathrm{ac}}\) but \(\mathrm{Q}_{\mathrm{ac}}>\mathrm{Q}_{\mathrm{ab}}\)
2 \(\Delta \mathrm{U}_{\mathrm{ab}}=\Delta \mathrm{U}_{\mathrm{ac}}\) but \(\mathrm{Q}_{\mathrm{ac}}=\mathrm{Q}_{\mathrm{ab}}\)
3 \(\Delta \mathrm{U}_{\mathrm{ab}}=\Delta \mathrm{U}_{\mathrm{ac}}\) but \(\mathrm{Q}_{\mathrm{ac}}>\mathrm{Q}_{\mathrm{ab}}\)
4 \(\Delta \mathrm{U}_{\mathrm{ab}}>\Delta \mathrm{U}_{\mathrm{ac}}\) but \(\mathrm{W}_{\mathrm{ac}}>\mathrm{W}_{\mathrm{ab}}\)
Explanation:
\( \Delta \mathrm{U}_{\mathrm{ab}}=\Delta \mathrm{U}_{\mathrm{ac}} \)
\( \mathrm{Q}_{\mathrm{ac}}>\mathrm{Q}_{\mathrm{ab}} \)