First slide

Graphs

Question

Heat energy absorbed by a system is going through a cyclic process as shown in figure, is

Moderate

A

$10^{7} π J$
B

$10^{4} π J$
C

$10^{2} π J$
D

$10^{3} π J$

Solution

In cyclic process, $Δ U = 0$
$∴ Heat absorbed = Work done = Area under p - V graph$
$= (π) (R_{x}) (R_{y})$
$= π (10 \times 10^{3}) (10 \times 10^{- 3}) = 10^{2} π J$

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