The fundamental way to transfer energy are:_____________?
Correct answer: D. heat and work
- A. pressure and temperature
- B. pressure and volume
- C. heat and volume
- D. heat and work
Explanation
Heat and work are the two ways energy crosses the boundary of a thermodynamic system, and both are measured in joules (J). Pressure, volume and temperature are state variables or properties, not modes of energy transfer. The likely wrong choice is pressure and volume because they appear in gas-work calculations, but they do not themselves represent the two fundamental transfer methods.
Last updated
About First Law of Thermodynamics
The first law states that energy is conserved, so the change in a system's internal energy equals heat supplied plus work done on the system, ΔU = q + w. Questions use sign conventions, expansion and compression work, state functions versus path functions, and the relation between internal energy and enthalpy.
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.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
According to the first law of thermodynamics, ΔU = Q + W, where ΔU Is the increase in internal energy of the system, Q is the heat transferred to the system and W is the external work done on the system.Which of the following is NOT a correct expression?
Choose the correct statement.
First law of thermodynamics is expressed as:
If 100 kJ of heat is absorbed by the system and 40 kJ of work is done on the system, what is the change of internal energy?
If 42J heat is transferred to the system during expansion, what is the change in internal energy when work done is 32J?