Chemistry · The first law of thermodynamics: Concept of work, heat, internal energy and enthalpy, heat capacity, molar heat capacity
Two bodies at different temperatures are mixed in a calorimeter. Which of the fo
Two bodies at different temperatures are mixed in a calorimeter. Which of the following quantities remains conserved?
- A. sum of the temperatures of the two bodies
- B. total heat of the two bodies
- C. total internal energy of the two bodies
- D. internal energy of each body
Step-by-step solution
When two bodies at different temperatures are mixed in an insulated calorimeter, no heat is exchanged with the surroundings and no work is done. Thus, the total internal energy of the two bodies remains conserved (first law of thermodynamics), while individual internal energies and temperatures change, and heat is transferred but not conserved as a quantity.
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