A: The temperature of the system remains unchanged
B: The system does not absorb heat from the environment
C: No heat exchange between the system and the environment
D: The internal energy of the system remains unchanged
举一反三
- In an isochoric (等容) process, all the energy added as heat remains in the system as an increase in internal energy.
- In a constant volume process for a closed system, the internal energy change of the system depends on the heat exchanged.
- In a constant pressure process for a closed system, the internal energy change of the system is equal to the sum of the heat exchanged and the work.
- For a system of an ideal gas, in which process of the following that the heat absorbed by the system and the work done toward the surroundings are positive? A: Isochoric (等体) and pressure decreasing process. B: Isothermal (等温) and expanding process. C: Adiabatic and expanding process. D: Isobaric (等压) and compressed process
- In a constant pressure process for a closed system, the enthalpy change of the system depends on the heat exchanged.
内容
- 0
The coal provides energy to the (heat) ____system of hospitals.
- 1
The coal provides energy to power the (heat) （） system of hospitals.
- 2
A gas system absorbs 200J of heat and simultaneously does 300J work on surroundings at a given temperature, what is △U in joules for the gas system? A: +100 B: -200 C: +200 D: -100
- 3
Industrial system affects only resources and environment system, but not social and economic system
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The system is expanded from equilibrium state a to equilibrium state b in the process of I, absorbing 500J of heat, working externally 400J; Then it is compressed to the original state a in the process of II, releasing heat 300J outward. Then, in the process of II, the change of the internal energy is[img=178x135]17e0b762b3b1660.png[/img] A: -100J B: 100J C: 200J D: -200J