When 22.5 When 22.5 grams of hydrogen sulfide(g) react with excess oxygen(g) acc

Question

When 22.5 When 22.5 grams of hydrogen sulfide(g) react with excess oxygen(g) according to the following reaction:

2H2S(g) + 3O2(g) 2H2O(g) + 2SO2(g) ?H = -1.04E+3 kJ

Which of the following is true?

a.

343 kJ of energy are released

b.

343 kJ of energy is absorbed

c.

686 kJ of energy are released

d.

686 kJ of energy is absorbed

e.

1373 kJ of energy are released

a.

343 kJ of energy are released

b.

343 kJ of energy is absorbed

c.

686 kJ of energy are released

d.

686 kJ of energy is absorbed

e.

1373 kJ of energy are released

Explanation / Answer

molar mass of H2S = 2+32 = 34

so, no. of moles of H2S = 22.5/34 = 0.661765 moles

for 2 mole H2S 1040 J is absorbed

so , for 0.661765 moles Energy absorbed = 344.117 J

so, option b is correcrt

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