First slide

First law of thermo dynamics

Question

At $27^{0} c$ , one mole of an ideal gas is compressed isothermally and reversibly from a pressure of 2 atm to 10 atm. The value of $∆ E$ and $W$ are

Moderate

Solution

$W_{rev} = - 2.303 RT \log \frac{P_{i}}{P_{f}}; W_{rev} = - 2.303 \times 2 \times 300 \times \log \frac{2}{10}; W_{rev} = 965.87 cals; For an isothermal process, ∆ E = 0;$

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