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The combustion of 5.00 g of C2H6(g), at constant pressure, releases 259 kJ of heat.?

Find DH for the reaction in kJ/g.

2 C2H6(g) + 7 O2(g) ® 4 CO2(g) + 6 H2O (l)

is it -51.8,-1295,-1550, -1667, -3110

2007-11-05 08:28:37 · 1 answers · asked by Cassie G 1 in Science & Mathematics ➔ Chemistry

1 answers

Molar mass of C2H6: ~30
Thus DH = (30/5)*(-259 kJ) = -1554 kJ

2007-11-08 14:12:58 · answer #1 · answered by Hahaha 7 · 0⤊ 0⤋

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