Home
Class 11
CHEMISTRY
Delta H f^(0) of diamond is...

`Delta H f^(0)` of diamond is

A

`0 " kj mol"^(-1)`

B

`1.90 " kj mol"^(-1)`

C

`38.1 " kj mol"^(-1)`

D

`20 " kj mol"^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • 14TH GROUP ELEMENTS

    NARAYNA|Exercise Level-I (C.W)|27 Videos

  • 14TH GROUP ELEMENTS

    NARAYNA|Exercise Level-II (C.W)|17 Videos

  • 13TH GROUP ELEMENTS

    NARAYNA|Exercise Comphensive Type Question|22 Videos

  • ACIDS & BASES

    NARAYNA|Exercise EXERCISE-III|43 Videos

Similar Questions

Explore conceptually related problems

Delta_(f) H of graphite is 0.23 kJ mol^(-1) and Delta_(f) H of diamond is 1.896 kh mol^(-1) . Delta H_(transition) from graphite to diamond is

Why Delta H_(f)^(@) of elements is zero?

Calorific value of H_2 is -143KJ g^(-1) . Hence, Delta H_(f)^(@) of H_2O is:

Heat of formation, Delta H_(f)^(@) of an explosive compound like NCl_(3) is -

The enthalpy of formation (Delta H_(f)) of a compound from its elements is

The heat of transition (Delta H_(t)) of graphite into diamond would be, where C (graphite) +O_(2)(g)to CO_(2)(g) , Delta H = x kJ C (diamond) +O_(2)(g)to CO_(2)(g) , Delta H = y kJ

Let (Delta)E denote the energy gap between the valence band and the conduction band.The population of conduction electrons (and of the holes)is roughly proportional to e^(-Delta E//2kT). Find the ratio of the concentration of conduction electrons in diamond to that in silicon at room tempareture 300K. (Delta E) for silicon is 1.1 ev and for diamond is 6.0eV.How many conduction electrons are likely to be in one cubic meter of diamond ?