If internal energy of the system is increased ____________________?
Correct answer: D. All
- A. Change in state of the system is increased
- B. Temperature of the ystem may rise
- C. Chemical reaction may take place
- D. All
Explanation
An increase in internal energy can appear as a temperature rise, a change of physical state, or energy that enables a chemical reaction, depending on how the energy is distributed. Therefore all listed effects may occur, while students may choose only temperature because they assume every increase in internal energy becomes sensible heat.
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
The second nuclear weapons used in warfare over Nagasaki, Japan, contain energy equal about of TNT?
In a bomb calorimeter, the heat of reaction measured corresponds to the change in
Internal energy of a system is the
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)
The internal energy of an ideal gas depends upon its:
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: