A substance releases 496kJ of heat as 2.60 moles condense from a gas into a liquid. What is the molar heat of vaporization of the substance?
q = mols x heat vap
496,000 = 2.60 x heat vap.
To find the molar heat of vaporization of a substance, we need to calculate the amount of heat energy released or absorbed per mole during the phase change from liquid to gas.
The given information tells us that 2.60 moles of the substance have condensed from a gas into a liquid, and 496 kJ of heat energy was released.
To calculate the molar heat of vaporization, we can use the formula:
Molar heat of vaporization = Heat released / Number of moles
Substituting the given values, we have:
Molar heat of vaporization = 496 kJ / 2.60 mol
Calculating the result:
Molar heat of vaporization = 190.77 kJ/mol
Therefore, the molar heat of vaporization of the substance is approximately 190.77 kJ/mol.