In a certain process a gas receives of heat and performs of work on the surroundings

PHYSICS · Single correct · CBSE · Physics · Thermodynamics · Thermodynamics

Problem

In a certain process a gas receives

120\,\text{J}

of heat and performs

50\,\text{J}

of work on the surroundings. Calculate the change in internal energy

\Delta U

of the gas. (a)

+170\,\text{J}

(b)

-70\,\text{J}

(c)

+70\,\text{J}

(d)

+120\,\text{J}