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Standard XII

Chemistry

1900's Physics and Wave

How much ener...

Question

How much energy is released when 1 gram of $C l$ atom is converted to $C l_{(g)}^{-}$ ion?

Electron affinity of $C l_{(g)}$ is 349 kJ/mol.

8.95 kJ

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9.83 kJ

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7.80 kJ

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6.56 kJ

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Solution

The correct option is B 9.83 kJ
1 mole has 35.5 grams of chlorine.

Thus for 1 gram, we need $\frac{349}{35.5} = 9.83 k J$ of energy.

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How much energy is released when 1 gram of Cl atom is converted to Cl−(g)ion? Electron affinity of Cl(g) is 349 kJ/mol.

The correct option is B 9.83 kJ1 mole has 35.5 grams of chlorine. Thus for 1 gram, we need 34935.5=9.83 kJ of energy.

How much energy is released when 1 gram of $C l$ atom is converted to $C l_{(g)}^{-}$ ion?

Electron affinity of $C l_{(g)}$ is 349 kJ/mol.

The correct option is B 9.83 kJ
1 mole has 35.5 grams of chlorine.

Thus for 1 gram, we need $\frac{349}{35.5} = 9.83 k J$ of energy.