A certain substance has a molar heat of vaporization of 54.2 kJ/mol. How much of the substance is in a sample that requires 80.0 kJ
to vaporize?
Answer in units of mol
54.2 kJ/mol x ?mol = 80.0 kJ.
Solve for ?mol.
To find the number of moles of the substance in the sample, we can use the equation:
moles = energy required / molar heat of vaporization
Given that the energy required is 80.0 kJ and the molar heat of vaporization is 54.2 kJ/mol, we can substitute these values into the equation:
moles = 80.0 kJ / 54.2 kJ/mol
Now, let's calculate the value:
moles = 1.475 mol
Therefore, there are approximately 1.475 moles of the substance in the sample.