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CH4 + 2 O2 --> CO2 + 2 H2O
∆H = - 802 kJ/mol
m CH4 = 4,8 gram
Mr CH4 = 16
n = m /Mr = 4,8 / 16 = 0,3 mol
energi yg dibebaskan = 0,3 mol × 802 kJ/mol = 240,6 kJ