Question

For $V-T$ diagrams of two process $ab$ and $cd$ shown in figure for same gas, match the following two columns and find the correct option.
$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{(a) Work done}& \text{(p) is more in process ab}\\ \text{(b) Change in internal energy}& \text{(q) is more in process cd}\\ \text{(c) Heat exchange}& \text{(r) is same in both process}\\ \text{(d) Molar heat capacity}& \text{(s) can't say anything}\end{array}$

• A. $a\to s;b\to s;c\to s;d\to r$
• B. $a\to q;b\to r;c\to p;d\to r$
• C. $a\to r;b\to q;c\to s;d\to s$
• D. $a\to s;b\to p;c\to q;d\to r$

Answer 1

The correct option is A $a\to s;b\to s;c\to s;d\to r$

Since the indicator diagram is a $V-T$ graph
$ab$ and $cd$ are isobaric process.
$\therefore$ For same gas; heat capacity $C_p$ remains same.
For $W$, $\Delta u$ and $Q$, we require number of moles of gas.
So, we can't deduce anything from graph.