A sample of ethanol (C2H6O) has a mass of
0.2301 g. Complete combustion of this sample causes the temperature of a bomb calorimeter to increase by 1.33°C. The calorimeter has a mass of 2.000 kg and a specific heat of 2.45 J/g•°C.
1. What is the heat of combustion for this sample?
A: 6.52 kJ
Scientists are often interested in knowing the molar heat of combustion – the heat released during the combustion of one mole of a substance. Use the Periodic Table to find molar masses.
2. How many moles of ethanol are present in the sample?
A: .004993
3. What is the molar heat of combustion for ethanol? Round using significant digits.
A: 1,310 kJ/mol