Home
Class 12
CHEMISTRY
The ionisation enthalpy of sodium is 495...

The ionisation enthalpy of sodium is 495 kJ `"mol"^(-1)`. How much energy is needed to convert atoms present in 2.3 mg of sodium to sodium ions?

A

24.75 J

B

49.5 J

C

99 J

D

23 J

Text Solution

Verified by Experts

The correct Answer is:
B
I.E. `=495kJ"mol"^(-1)`
Energy needed to ionize(1 mol) 23 g of sodium vapiur `=495kJ`
Energy needed to ionize `2.3xx10^(-3)g` of sodium vapour `=495/23xx 2.3xx10^(-3)=49.5J`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

    MODERN PUBLICATION|Exercise MULTIPLE CHOICE QUESTIONS (LEVEL -II)|55 Videos

  • CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

    MODERN PUBLICATION|Exercise MULTIPLE CHOICE QUESTIONS (LEVEL-III)|6 Videos

  • CHEMISTRY OF s-BLOCK ELEMENTS

    MODERN PUBLICATION|Exercise RECENT EXAMINATION QUESTIONS|6 Videos

  • COORDINATION COMPOUNDS

    MODERN PUBLICATION|Exercise Recent Examination Questions|21 Videos

Similar Questions

Explore conceptually related problems

The ionisation potential of hydrogen atom is 13.6 V. How much energy need to be supplied to ionise the hydrogen atom in the first excited state ?

The ionization enthalpy of hydrogen atom is 1.312 xx 10^6 J mol^(-1). The energy required to excite the electron in the atom from n = 1 to n = 2 is

Knowledge Check

  • The ionization enthalpy of sodium is 495 kJ mol^(-1) . How much energy in Joules must be required convert all the atoms of sodium to sodium ions present in 2.3 mg of sodium vapours?

    A
    495 kJ
    B
    49.5 J
    C
    49.5 kJ
    D
    4.95 J.

  • Ionisation enthalpy of litium is 520kJ"mol"^(-1) How much energy in joules must be needed to convert all atoms of lithium to ions present in 7 mg of lithium vapours?

    A
    74.3 J
    B
    260J
    C
    520J
    D
    780J

  • The electron affinity of chlorine is 349 kJ mol^(-1) . How much energy in Joules must be released when 1 mg of chlorine is converted to Cl^(-)(g) ions?

    A
    9.83 J
    B
    9830 J
    C
    983 J
    D
    9.83 kJ.

    • Similar Questions

    Explore conceptually related problems

    The ionisation energy of H atom is x kJ. The energy required for the electron to jump from n=2 to n=3 will be

    The ratio of mass of 1 mole of sodium and 10^23 atoms of sodium is :

    The enthalpy of formation of NH_3 is – 46 kJ mol^(-1) The enthalpy change for the reaction: 2NH_3(g) rarr N_2(g) + 3H_2(g) is

    The standard enthalpy of formation NH_3 is - 46 cdot 0 k J mol^(-1) . If the enthalpy of formation of H_2 forms its atoms is -436 k J mol^(-1) and that of N_2 is - 712 k J mol^(-1) , the average bond enthalpy of N – H bond is NH_3 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

    Home
    Profile