When 2.00 g of methane are burned in a bomb calorimeter, the change in temperature is 3.08°c. the heat capacity of the calorimeter is 2.68 kj/°c. the molar mass of methane is 16.042 g/mol. what is the approximate molar enthalpy of combustion of this substance?

The approximate molar enthalpy of combustion of this substance is -66 kJ/mole.

Explanation:

First we have to calculate the heat gained by the calorimeter.

where,

q = Heat gained = ?

c = Specific heat =

ΔT =  The change in temperature = 3.08°C

Now put all the given values in the above formula, we get:

Now we have to calculate molar enthalpy of combustion of this substance :

where,

= enthalpy change = ?

q = heat gained = 8.2544kJ

n = number of moles methane =

Therefore,  the approximate molar enthalpy of combustion of this substance is -66 kJ/mole.

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because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

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