Question

One mole of a gas is heated at constant pressure to raise its temperature by $1^{\circ }C$. The work done in joules is

• A. $-4.3$
• B. $-8.314$
• C. $-16.62$
• D. Unpredictable

Answer 1

The correct option is B $-8.314$

$w=-P\Delta V=-P(\frac{nR{T}_2}{P}-\frac{nR{T}_1}{P})=-nR(T_2-T_1)=-1\times 8.314\times 1=-8.314J$