The process,in which no heat enters or leaves the system,is termed as

What happens when methane undergoes combustion in systems $A$ and $B$ respectively?

System $A$	System $B$
Temperature rise	Temperature remains same

Which one of the following reactions has $\Delta H = \Delta U$?

Explain enthalpy changes during phase transformations.

The amount of heat measured for a reaction in a bomb calorimeter is

One mole of a gas expands from $1 \, L$ to $5 \, L$ against a constant external pressure of $1 \, atm$. How much work is done in Joules (in $, J$)? $(1 \, L \cdot atm = 101.3 \, J)$