Home
Class 12
CHEMISTRY
Calculate (1) the enthalpy change in the...

Calculate (1) the enthalpy change in the fusion of 100 g ice at `0^(@)C` temperature and 1 atm pressure pressure (2) the enthalpy change in the vaporisation of 10g water at `100^(@)C` temperature and 1 atm pressure. Givenn : Latent heat of ice at `0^(@)C` temperature and 1 atm pressure `=6.02kJ*mol^(-1)` and latent heat of vaporisation of water at `100^(@)C` temperature=`40.4kJ*mol^(-1)`.

Text Solution

Verified by Experts

(1) Latent heat of fusion of ice at `0^(@)C` temperature and 1 atm pressure=`6.02kJ*mol^(-1)`. Therefore, enthalpy of fusion of 18g ice`=6.02kJ`.
`therefore`Enthalpy of fusion 100g ice`=(6.02)/(18)xx100=33.44kJ`
`therefore`Change in enthalpy of fusion of 100g ice `=+33.44kJ`.
(2) Latent heat of vaporisation of water at `100^(@)C`
`=40.4kJ*mol^(-1)`. therefore, the enthalpy of vaporisation of 18g water=40.4 kJ
`therefore`Enthalpy of vapourisation of 10g water
`=(40.4)/(18)xx10=22.44kJ`
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL THERMODYNAMICS

    CHHAYA PUBLICATION|Exercise WARM UP EXERCISE|119 Videos

  • CHEMICAL THERMODYNAMICS

    CHHAYA PUBLICATION|Exercise QUESTION ANSWER ZONE FOR BOARD EXAMINATION (VERY SHORT ANSWER TYPE)|26 Videos

  • CHEMICAL KINETICS

    CHHAYA PUBLICATION|Exercise EXERCISE (NUMERICAL PROBLEMS)|37 Videos

  • CHEMISTRY IN EVERYDAY LIFE

    CHHAYA PUBLICATION|Exercise PRACTICE SET 15|15 Videos

Similar Questions

Explore conceptually related problems

What is the vapour pressure of pure water at 100^(@)C temperature ?

Calculate the values of Delta H and DeltaU in the vaporisation of 90g of water at 100^(@)C and 1 atm pressure. The latent heat of vaporisation of water at the same temperature and pressure =540cal*g^(-1)

Calculate the volume of 3.6g of water vapour at 273K temperature and 1 atm pressure.

What do you mean by the enthalpy of solidification of water at 0^(@)C and 1 atm pressure =- 6.02 " kJ mol"^(-1) ?

The weight of 350 mL of a diatomic gas at 0^(@)C temperature and 2 atm pressure is 1g. Calculate the weight of its one atom.

Heat required to vaporise 1 g of water at 100^(@)C and 1 atm is 2.26 kJ. What is the enthalpy of vaporisation of water at this temperature and pressure?

What will be the signs of DeltaG for melting of ice at 267 K and 276K temperature and 1 atm pressure?

Enthalpy of fusion of ice at 0^(@)C and 1 atm is 6.02 kJ *mol^(-1) . The change in entropy (J*K^(-1)) of the surroundings when 9 g of water is frozen at 0^(@)C and 1 atm pressure is-

Determine the change in enthalpy and internal energy when 1 mole of water completely vaporises at 100^(@)C and 1 atm pressure. [Latent heat of vaporisation of water=536 cal*g^(-1) ]

Is the vaporisation of water at 50^(@)C and 1 atm spontaneous? Given: For vaporisation of water at what temperature and pressure, DeltaH=40.67kJ*mol^(-1) and DeltaS=108.79J*K^(-1)*mol^(-1) .