If a chemical reaction is accompanied by the evolution of heat,it is

The enthalpy of a reaction at $273 \, K$ is $-3.57 \, kJ$. If $\Delta C_p = 0$,what will be the enthalpy of the reaction at $373 \, K$?

An exothermic reaction is one in which the reacting substances

Explain the difference between the system and surroundings.

Find the constant external pressure required to expand a gas from $2.5 \ L$ to $4.5 \ L$ if the amount of work done is $500 \ J$ at $298 \ K$. (in $bar$)

Which of the following expressions is true for an ideal gas?