A given substance of mass 'm' is in solid state at certain temperature. Arrange the following steps in proper sequence to calculate the total heat energy required to just convert the substance completely into gaseous state.
(A) Note down the specific latent heat of vapor ization of the substance and calculate the heat supplied to convert from liquid to gaseous state using the formula.
(B) Note down the melting point of the substance and calculate the heat supplied to increase the temperature of the solid to its melting point.
(C ) Note down the boiling point of the substance and calculate the heat supplied to increase the temperature of the substance from melting point to its boiling point.
(D) Add all the heat energies, it gives the resultant heat supplied to the solid to just convert it into gaseous state.
(E) Note down the specific latent heat of fusion of the substance and calculate the heat supplied to convert the substance from solid state to liquid state.

Options

A. B D E C A
B. A C E D B
C. A B C D E
D. B E C A D

Answer

d

Explanation

To calculate the total heat energy supplied, first note down the melting point of the substance and calculate the heat energy supplied to solid to increase the temperature to its melting point (b). Now calculate the heat energy supplied to the solid state to convert it into liquid state by taking specific latent heat of fusion (e). Note down the boiling point of the substance and calculate the heat energy supplied to increase the temperature from melting point to boiling point (C). Now calculate the heat energy supplied to the liquid at its boiling point to convert it into gaseous state by taking the specific latent heat of vaporization (a). By adding all the heat energies, we will get the resultant heat supplied to convert solid into gas (d).