JEE MAIN - Chemistry (2019 - 9th January Evening Slot - No. 15)
When the first electron gain enthalpy $$\left( {{\Delta _{eg}}H} \right)$$ of oxygen is $$-$$ 141 kJ/mol, its second electron gain enthalpy is :
a more negative value than the first
almost the same as that of the first
negative, but less negative than the first
a positive value
Explanation
Second electron gain enthalpy is always positive for every element.
O$$-$$(g) + e$$-$$ $$ \to $$ O$$-$$2(g) ; $$\Delta $$H = positive
O$$-$$(g) + e$$-$$ $$ \to $$ O$$-$$2(g) ; $$\Delta $$H = positive
Comments (0)
