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Standard XII

Chemistry

Difference between Internal Energy and Enthalpy

Carefully obs...

Question

Carefully observe the given diagrams which indicates standard enthalpy of formation of different states of one mole Mg and 2 mole Cl atom and match the entries in column I and II provided.
Energy (kJ) State of Mg and $C l_{2}$

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Solution

(A) $Δ H_{f} [M g^{2 +} (a q)]$ is +460 kJ/mole.
(B) $Δ H_{f} [M g^{-} (a q)]$ is -625 kJ/mole.
(C) $Δ H_{h y d r a t i o n} [M g^{2 +} (g)]$ is -1900 kJ/mole.
(D) $∣ ∣ L . E ._{M g C l_{2} (s)} ∣ ∣$ is +2510 kJ/mole.

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Carefully observe the given diagrams which indicates standard enthalpy of formation of different states of one mole Mg and 2 mole Cl atom and match the entries in column I and II provided.Energy (kJ)State of Mg and Cl2

(A) ΔHf[Mg2+(aq)] is +460 kJ/mole.(B) ΔHf[Mg−(aq)] is -625 kJ/mole.(C) ΔHhydration[Mg2+(g)] is -1900 kJ/mole.(D) ∣∣L.E.MgCl2(s)∣∣ is +2510 kJ/mole.

Carefully observe the given diagrams which indicates standard enthalpy of formation of different states of one mole Mg and 2 mole Cl atom and match the entries in column I and II provided.
Energy (kJ) State of Mg and $C l_{2}$

(A) $Δ H_{f} [M g^{2 +} (a q)]$ is +460 kJ/mole.
(B) $Δ H_{f} [M g^{-} (a q)]$ is -625 kJ/mole.
(C) $Δ H_{h y d r a t i o n} [M g^{2 +} (g)]$ is -1900 kJ/mole.
(D) $∣ ∣ L . E ._{M g C l_{2} (s)} ∣ ∣$ is +2510 kJ/mole.