One mole of a gas is heated at constant pressure to rai

| One mole of a gas is heated at constant pressure to raise its temperature by

1^{\circ} C

. The work done is

A. -4.3 J

B. -8.314 J

C. -16.62 J

D. Unpredictable

Please scroll down to see the correct answer and solution guide.

The work done can be given by:

$w = - P Δ V$

$w = - P (V_{2} - V_{1}) = - P (\frac{n R T_{2}}{P_{1}} - \frac{n R T_{1}}{P_{1}})$

$P_{1} = P$

$∴ w = - n R (T_{2} - T_{1})$

$∴ w = - 1 \times 8.314 \times 1$

$∴ w = - 8.314$