The First Law of thermodynamics is _.
Correct answer: C. ΔE = q+w
- A. ΔE = ΔH
- B. ΔE = q + p
- C. ΔE = q+w
- D. ΔE = -PΔV
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).
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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.
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