Question

A bomb calorimeter has a heat capacity of 2.47 kJ/K. When a 0.105-g sample of ethylene (C 2H 4) was burned in this calorimeter, the temperature increased by 2.14 K. Calculate the energy of combustion for one mole of ethylene.

Answer 1

Combustion energy for one mole of ethylene = 1410.51 kJ/mol

Step-by-step explanation:

Given data

heat capacity of bomb calorimeter = 2.47kJ/K

`\Delta T = 2.14 K`

molecular weight of
`C_2H_4 =  2*12.01+1.008*4=28.052`

Total energy released after burning 0.105 g sample is = 2.47 *2.14 =5.28 kJ

Combustion energy for one mole of ethylene
`= (5.28 *28.05)/(0.105)`

= 1410.51 kJ/mol