Identify the process that proceeds with no heat exchange between the system and the surrounding.

An ideal gas is allowed to expand from $2 \ dm^3$ to $6 \times 10^{-3} \ m^3$ against a constant external pressure of $1 \ bar$. The work done in $kJ$ is (in $kJ$)

Although heat is a path function,heat absorbed by the system under certain specific conditions is independent of path. What are those conditions? Explain.

When a solvent is added to a solution,the heat of the solution $...$.

Work done during isothermal expansion of one mole of an ideal gas from $10 \,atm$ to $1 \,atm$ at $300 \,K$ is.....$J$

The internal energy change when a system goes from state $A$ to $B$ is $40 \, kJ/mol$. If the system goes from $A$ to $B$ by a reversible path and returns to state $A$ by an irreversible path,what would be the net change in internal energy?