The temperature change versus heat supplied curve is given for 1 kg of a solid block. Then, which of the following statement is/are correct ?

Options

A. Specific heat capacity of the solid is `2J kg^(-1) K^(-1)`
B. Specific heat capacity of liquid phase is `sqrt3 J kg^(-1) K^(-1)`
C. Latent heat of vaporisation is `100J kg^(-1)`
D. Latent heat of vaporisation is `200J kg^(-1)`

Answer

D

Explanation

Heat supplied, dQ = `ms.dT`
m = 1 kg
`therefore` `s = (dQ)/(dt)` = Slope of Q-T graph
`S_(solid)` = `tan45^(@)= 1J kg^(-1) Ki^(-1)`
`S_(liquid)` = `tan30^(@)` = `1/sqrt(3)`J `kg^(-1)K^(-1)`
Latent heat of vaporisation = heat required to melt complete 1 kg = 200 J `kg^(-1)`