When vapour condenses into liquid,

Explain the three states of matter and the process of change in states.

An experiment takes $10\, minutes$ to raise the temperature of water in a container from $0\,^oC$ to $100\,^oC$ and another $55\, minutes$ to convert it totally into steam by a heater supplying heat at a uniform rate. Neglecting the specific heat of the container and taking the specific heat of water to be $1\, cal/g\,^oC$,the heat of vaporization according to this experiment will be ........ $cal/g$.

Heat is supplied to a certain homogeneous sample of matter at a uniform rate. Its temperature is plotted against time,as shown. Which of the following conclusions can be drawn?

Boiling water is changing into steam. Under this condition,the specific heat of water is

$A$ solution consists of ether and $5.0 \ g$ of water at $0^{\circ} C$. If the ether evaporates completely to freeze the water,then the mass of the ether in the solution is (in $g$)