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Chem Help Please!!!! Thermodynamics!!?
If the heat of combustion for a specific compound is -1340.0 kJ/mol and its molar mass is 67.97 g/mol, how many grams of this compound must you burn to release 942.60 kJ of heat?
2 Answers
- billrussell42Lv 73 years agoFavorite Answer
this is just dimensional analysis, not much to do with chemistry
If the heat of combustion for a specific compound is -1340.0 kJ/mol and its molar mass is 67.97 g/mol, how many grams of this compound must you burn to release 942.60 kJ of heat?
942.60 kJ x (67.97 g/mol) / (1340.0 kJ/mol) = 47.81 g
- Old Science GuyLv 73 years ago
this is a conversion
X g (-1340.0 kJ/mol) / 67.97 g/mol = -942.6 kJ
X g = 47.8 g
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