Ahydrocarbon sample was burned in a bomb calorimeter. the temperature of the calorimeter and the 1.00 kg of water rose from 20.45°c to 23.65°c. the heat capacity of the calorimeter, excluding the water, is 2.21 kj/°c. using this information, determine the heat released by the combustion.

The heat released by the combustion is 20,47 kJ

Explanation:

Bomb calorimeter is an instrument used to measure the heat of a reaction. The formula is:

Q = C×m×ΔT + Cc×ΔT

Where:

Q is the heat released

C is specific heat of water (4,186kJ/kg°C)

m is mass of water (1,00kg)

ΔT is temperature change (23,65°C - 20,45°C)

And Cc is heat capacity of the calorimeter (2,21kJ/°C)

Replacing these values the heat released by the combustion is:

Q = 20,47 kJ

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.