A$.$ How much work $($in $J)$ is involved in a chemical reaction if the volume decreases from $5\mathrm{.}50$ to $1\mathrm{.}31L$ against a constant pressure of $0\mathrm{.}880$atm $?$

Express your answer to three significant figures and include the appropriate units.

B$.$ Calculate the change in internal energy of the following system: A balloon is cooled by removing $0\mathrm{.}652kJ$ of heat. It shrinks on cooling, and the atmosphere does $384J$ of work on the balloon.

Express your answer to three significant figures and include the appropriate units.

C$.$ Calculate the change in internal energy of the following system: A $100\mathrm{.}0-$ g bar of gold is heated from $25.$C to $50.$C during which it absorbs $322J$ of heat. Assume the volume of the gold bar remains constant.

Express your answer to three significant figures and include the appropriate units.