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Standard XII

Chemistry

Enthalpy

Bond energy o...

Question

Bond energy of hydrogen gas is $- 433 k J$ . How much is the bond dissociation energy of $0.5 m o l e$ of hydrogen gas?

- 433 k J

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+ 433 k J

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- 216 k J

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+ 216 k J

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Solution

The correct option is C $+ 216 k J$
Bond dissociation energy $= -$ bond formation energy
Given, bond energy of hydrogen $= - 433 k J$
$∴$ Bond dissociation energy of one mole $H_{2} = 433 k J$
$∴$ Bond dissociation energy of $0.5$ mole $H_{2} = \frac{433}{2} = + 216.5 k J$

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Bond energy of hydrogen gas is −433kJ. How much is the bond dissociation energy of 0.5mole of hydrogen gas?

The correct option is C +216kJBond dissociation energy =− bond formation energyGiven, bond energy of hydrogen =−433kJ∴ Bond dissociation energy of one mole H2=433kJ∴ Bond dissociation energy of 0.5 mole H2=4332=+216.5kJ

Bond energy of hydrogen gas is $- 433 k J$ . How much is the bond dissociation energy of $0.5 m o l e$ of hydrogen gas?

The correct option is C $+ 216 k J$
Bond dissociation energy $= -$ bond formation energy
Given, bond energy of hydrogen $= - 433 k J$
$∴$ Bond dissociation energy of one mole $H_{2} = 433 k J$
$∴$ Bond dissociation energy of $0.5$ mole $H_{2} = \frac{433}{2} = + 216.5 k J$