First law of thermodynamics is represented as:
Correct answer: B. ∆E = q+w
- A. ∆E = q+ RT
- B. ∆E = q+w
- C. ∆E= ∆H
- D. ∆E, = q+ ∆NP
Explanation
The first law of thermodynamics is given as ΔE=q+w, where ΔE is the change in internal energy of a system, q is the net heat transfer (the sum of all heat transfer into and out of the system), and w is the net work done (the sum of all work done on or by the system).
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
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 Thermochemistry and Energetics of Chemical Reactions questions
In an exothermic reaction A II is assigned:
Which of the following is endothermic process?
The amount of heat supplied at constant pressure is 18 kj/mol at 450C, the enthalpy change of system is :
The conditions for standard enthalpy changes are:
Which substance has ∆E = ∆H and no pressure-volume work:
At constant volume, heat of reaction is represeted by: