A 0.1964-g sample of quinone (c6h4o2) is burned in a bomb calorimeter that has a heat capacity of 1.56 kj/c. the temperature of the calorimeter increases by 3.2c. calculate the energy of combustion of quinone per gram and per mole

Question

Yaretzi Osborn

Chemistry

10 June, 03:34

A 0.1964-g sample of quinone (c6h4o2) is burned in a bomb calorimeter that has a heat capacity of 1.56 kj/c. the temperature of the calorimeter increases by 3.2c. calculate the energy of combustion of quinone per gram and per mole

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Armando · Answer 1

Quinone mass in grams = 0.1964g

Heat capacity = 1.56 KJ/C

Temerature = 3.2C

Heat energy that is lost while combustion, dH = heat capacity x temp

dH = 1.56 KJ/c x 3.2c = > dH = 4.992 KJ

Since it is the energy lost, it is represented as dH = - 4.992 KJ

Calculating the heat energy per gram = 4.992/0.1964 = - 25.4 KJ/m

Molar weight of the compound is 108.1 g/mol

Calculating the heat energy per mole = - 25.4 KJ/g x 108.1 g/mol = > - 25.4 x

108.1 KJ/mol

Heat energy per mole = - 2747.63 KJ/mol