Physics

Problem

Three moles of an ideal gas absorb

2.0\,\text{kJ\,mol}^{-1}

of heat in a certain process. During the same process, the gas performs

900\,\text{J}

of work on the surroundings. Determine the change in internal energy of the gas. a)

6.9\times10^{3}\,\text{J}

-5.1\times10^{3}\,\text{J}

5.1\times10^{3}\,\text{J}

5.7\times10^{3}\,\text{J}