Find the molar heat of vaporization for a
substance, if 3.28mol of the substance absorbs
24.8 kJ of energy when it changes from a liquid
to a gas.
Answer in units of kJ/mol
What do we have? We have 3.28 mol absorb 24.8 kJ. We want to know kJ/mol. That's
24.8 kJ/3.28 mol = ? kJ/mol.
To find the molar heat of vaporization, we need to divide the energy absorbed by the substance by the number of moles of the substance. In this case, we are given the energy absorbed as 24.8 kJ and the number of moles as 3.28.
The molar heat of vaporization can be calculated using the formula:
Molar heat of vaporization = Energy absorbed / Number of moles
Plugging in the values:
Molar heat of vaporization = 24.8 kJ / 3.28 mol
Calculating this, we get:
Molar heat of vaporization = 7.56 kJ/mol
Therefore, the molar heat of vaporization for the substance is 7.56 kJ/mol.