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Mr elpiji = 3(12) + 8(1) = 44
mol elpiji = 44 / 44 = 1 mol
⇒ 11 gram elpiji = 11/44 = 0,25 mol
pembakaran 1 mol elpiji membebaskan kalor 2220 kJ
sehingga, untuk 0,25 mol dibebaskan kalor sebanyak:
[0,25/1] x 2220 = 555 kJ