Which named process has constant volume?

Which named process has no heat transfer?

For an isochoric process with \(Q=450\,\mathrm{J}\), find \(W\) and \(\Delta U\).

For an isobaric expansion at \(p=2.0\times10^5\,\mathrm{Pa}\) with \(\Delta V=0.010\,\mathrm{m^3}\), find \(W\).

An ideal gas expands isothermally and does \(350\,\mathrm{J}\) of work. Find \(\Delta U\) and \(Q\).

A gas undergoes an adiabatic compression with \(W=-280\,\mathrm{J}\). Find \(Q\) and \(\Delta U\).

A process is isobaric with \(Q=900\,\mathrm{J}\) and \(W=250\,\mathrm{J}\). Find \(\Delta U\) and state whether temperature rises for an ideal gas.

A cyclic process rejects \(400\,\mathrm{J}\) of heat overall. Find net work done by the system and interpret its sign.

An ideal gas goes from state \(A\) to state \(B\) with the same temperature by two processes: isothermal expansion and free expansion into vacuum. Compare \(Q\), \(W\), and \(\Delta U\) for the two processes.

A gas is heated from \(T_i\) to \(T_f\) once at constant volume and once at constant pressure. For an ideal gas, derive which path requires more heat and by how much per mole.