How much heat will be released when 10.0 g of hydrogen peroxide decomposes according to the following reaction: 2H2O2 (l) 2H2O (l) + O2 (g) ΔH = - 190 kJ

A. 26 kJ

B. 22 kJ

C. 28 kJ

D. 24 kJ

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13 March, 11:20

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Jocelynn Juarez · Answer 1

C. 28 KJ

AMU of H2O2 = 2 (1) + 2 (16) = 34 g/mol

10 g / 34 g/mol = 0.294 mol H2O2

0.294 mol / H = 2 mol / 190 KJ

H = 28.9 KJ

How much heat will be released when 10.0 g of hydrogen peroxide decomposes according to the following reaction: 2H2O2 (l) 2H2O (l) + O2 (g) ΔH = - 190 kJA. 26 kJB. 22 kJC. 28 kJD. 24 kJ