Which form of matter possesses a higher magnitude of internal energy?
Correct answer: A. Gaseous matter
- A. Gaseous matter
- B. Solid matter
- C. Liquid matter
- D. all have the same magnitude
Explanation
Internal energy is defined as the sum of kinetic and potential energies associated with the random motion of atoms in a substance, and consequently, it depends on temperature and the state of matter. As can be seen from the image, it can be deduced that Temperature effects the kinetic energy of atoms, while change of state effects their potential energy. Hence, as substance changes from Solid to liquid and from liquid to gas, its particles move apart, potential energy increases, and internal energy increases.
This question appeared on the ETEA MDCAT 2006 paper, which you can sit online with every answer explained.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Internal Energy
Internal energy is the total microscopic kinetic and potential energy of a system and is a state function. The first law, ΔU = q + w, connects changes in internal energy with heat and work, including sign conventions, expansion or compression and constant-volume processes.
Practise Thermochemistry and Energetics of Chemical Reactions
728 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 Internal Energy questions
At constant volume the heat supplied is equal to:
A system absorbs 100 kJ of heat and performs 50 kJ of work on the surroundings. The change in internal energy of the system is:
The internal energy of an ideal gas depends upon its:
The sum of all possible kinds of energies of all atoms, molecules or ions within a system is called:
Change in heat at constant volume is the measure of:
The value of (∆H−∆U) for the formation of carbon monoxide (CO) from its elements at 298 K is: (R = 8.314 J K⁻¹ mol⁻¹)