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Where possible, classify these systems as reactant-favored or product-favored at

ID: 832450 • Letter: W

Question

Where possible, classify these systems as reactant-favored or product-favored at 298 K. If the direction cannot be determined from the information given, classify the reaction as "Insufficient information".

a.) 2A(g)+B(g) ----> C(g)
                        <----
    Delta H = +235KJ
b.) 2A(g)+B(s) ----> C(g)
                        <----
    Delta H = -193KJ

c.) A(g)+B(g) ----> C(g)
                        <----
    Delta H = -97KJ

d.) 2A(g)+2B(g) ----> 5C(g)
                        <----
    Delta H = +313KJ

Explanation / Answer

When Delta H = -ve, it implies loss of energy and molecule becomes more stable.

a.) 2A(g)+B(g) ----> C(g)
                        <----
    Delta H = +235KJ Hence, Reactant favoured.
b.) 2A(g)+B(s) ----> C(g)
                        <----
    Delta H = -193KJ   Hence, Product favoured.

c.) A(g)+B(g) ----> C(g)
                        <----
    Delta H = -97KJ   Hence, Product favoured.

d.) 2A(g)+2B(g) ----> 5C(g)
                        <----
    Delta H = +313KJ Hence, Reactant favoured.

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