The following thermochemical equation is for the reaction of hydrogen sulfide(g) with water(l) to form hydrogen(g) and sulfur dioxide(g). H2S(g) + 2H2O(g)3H2(g) + SO2(g)     H = 207 kJ When 7.50 grams of hydrogen sulfide(g) react with excess water(l),  kJ of energy are

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The following thermochemical equation is for the reaction of hydrogen sulfide(g) with water(l) to form hydrogen(g) and sulfur dioxide(g).

H2S(g)

        +

2H2O(g)3H2(g)

        +

SO2(g)

            H =

207

    kJ

When 7.50 grams of hydrogen sulfide(g) react with excess water(l),  kJ of energy are 

 

.

Hint: An amount of energy is expressed as a positive number. The sign of ΔH in the thermochemical equation indicates whether the energy is absorbed or evolved.

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