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Specific Heat Capacity

3000 J of hea...

Question

$3000 J$ of heat is given to a gas at a constant pressure of $2 \times 10^{5} N / m^{2}$ . If its volume increases by $10$ litres during the process find the change in the internal energy of the gas.

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Solution

$△ Q = 3000 J$
$△ W = P △ V = (2 \times 10^{5} N / m^{2}) (10 \times 10^{- 3} m^{3}) = 2 \times 10^{3} J$
$△ U = △ Q - △ W = 3000 - 2000 = 1000 J$ .

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