Home
Class 12
CHEMISTRY
The enthalpy of vaporisation of water is...

The enthalpy of vaporisation of water is `186.5 kJ mol^(-1)`. The entropy of its vaporisation will be :

A

`2.0 JK^(-1)`

B

`200 JK^(-1)`

C

`0.5 JK^(-1)`

D

`1.5 JK^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
`Delta S = (Delta_("vap") H)/(T_(b))`
`= (186.5)/(373) = 0.5 JK^(-1)`
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    MODERN PUBLICATION|Exercise Multiple Choice Questions (Level-II)|85 Videos

  • THERMODYNAMICS

    MODERN PUBLICATION|Exercise Multiple Choice Questions (Level-III)|10 Videos

  • THE SOLID STATE

    MODERN PUBLICATION|Exercise RECENT EXAMINATION QUESTIONS|11 Videos

  • UNIT TEST - 3

    MODERN PUBLICATION|Exercise MULTIPLE CHOICE QUESTIONS|59 Videos

Similar Questions

Explore conceptually related problems

Delta H (vap) for water is 40.7 kJ mol^(-1) . The entropy of vaporisation of water is :

The enthalpy of vaporisation for water is 41.2 kJ mol^(-1), DeltaH for the reaction 2H_2O(g) to 2H_2O(l) is :

The standard enthalpy of formation of NH_(3) is - 46.0 kJ mol^(-1) . If the enthalpy of formation of H_(2) from its atoms is - 436 kJ mol^(-1) and that of N_(2) is - 712 kJ mol^(-1) , the average bond enthalpy of N - H bond is NH_(3) is

The enthalpy of the reaction : H_(2)O_(2)(l) rarr H_(2)O(l) + (1)/(2)O_(2)(g) is -98.3 KJ mol^(-1) and the enthalpy of formation of H_(2)O(l) is -285.6 kJ mol^(-1) . The enthalpy of formation of H_(2)O_(2)(l) is :

The enthalpy of vaporisation of a substance is 8400 J mol^(-1) and its boiling point is -173^(@)C . The entropy change for vaporisation is :

The molar heat of vaporisation for water is 9.72 kcal mol^(-1) . The amount of heat change when 45 g of water condense is :