JEE PHYSICS MCQ: THERMODYNAMICS

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Application +4 | -1

When an ideal gas

\left( {\gamma = 5/3} \right)

is heated under constant pressure, then what percentage of given heat energy will be utilised in doing external work

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Correct option: A

0.4

Option A (0.4) is correct because the fraction of heat used for external work in a constant pressure process is related to γ by the formula

\frac{Δ W}{Δ Q}

= 1 -

\frac{1}{γ}

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\left( {\gamma = \frac{{{C_p}}}{{{C_v}}}} \right)