Question

3.0 moles of an ideal gas is heated at constant pressure from ${27}^{o}C$ to ${127}^{o}C$. The work done by the gas in this expansion is:

• A. - 2.494 kJ
• B. + 2.494 kJ
• C. - 10.5 kJ
• D. + 10.5 kJ

Answer 1

The correct option is A - 2.494 kJ

Work done by the gas, $W=-P\Delta V$

$W=-nR\Delta T$

$W=-3\times 8.314\times 100\times {10}^{-3}kJ$

$W=-2.4942kJ$