Which of the following has the highest heat of vaporization?
Correct answer: C. Water
- A. Nitrogen gas
- B. Ethene
- C. Water
- D. All have the same heat of vaporization
Explanation
The heat of vaporization is defined as the amount of heat required to convert 1g of a liquid into vapors, without any change in temperature. The heat of vaporization depends on the intermolecular forces in a substance. Water molecules have a strong hydrogen bonding, which accounts for their high heat of vaporization at 40.8 kJ/mol.Ethene (ethylene) and nitrogen have heats of vaporization of 13.5 kJ/mole and 2.79 kJ/mol respectively.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Thermochemistry and Energetics of Chemical Reactions
Thermochemistry measures energy changes in chemical reactions and distinguishes exothermic from endothermic processes. Work covers systems, surroundings and state functions, internal energy, the first law of thermodynamics, enthalpy and Hess's law, including the sign conventions used when heat enters or leaves a system.
Practise Thermochemistry and Energetics of Chemical Reactions
729 free Thermochemistry and Energetics of Chemical Reactions MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Thermochemistry and Energetics of Chemical Reactions questions
Energy for endothermic reaction comes from:
Steam causes more severe burns than boiling water because it has _.
Which one of the following is a state function that describe both the internal energy and product of pressure and volume?
Which one has greater hydration energy?
Bond energy is also called bond enthalpy that is the measure of enthalpy change at:
Enthalpy is the sum of internal energy and: