Fill in the blanks:
$(i)$ $1 \ \text{calorie} = \ldots \ldots \ \text{joules}$
$(ii)$ The work done by the system can be calculated by the equation .......

On what factors does the enthalpy of dilution of a solution depend?

An ideal gas expands isothermally from $10^{-3} \; m^{3}$ to $10^{-2} \; m^{3}$ at $300 \; K$ against a constant external pressure of $10^{5} \; Nm^{-2}$. The work done on the gas is:

What is an exothermic reaction and an endothermic reaction?

Give the formula that shows the relationship between the boiling point and the enthalpy of evaporation of a solvent.

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