Which of the following statements is true regarding the universe according to the laws of thermodynamics?

  • A
    The total entropy of the universe is continuously decreasing.
  • B
    The total energy of the universe is continuously decreasing.
  • C
    The total energy of the universe remains constant.
  • D
    The total entropy of the universe remains constant.

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If $5 \ kJ$ of work is done on the system and $1 \ kJ$ of heat is released by the system,find the change in internal energy in $kJ$.

Which of the following statements is correct?

Three moles of an ideal gas expand reversibly under isothermal conditions from $2 \, L$ to $20 \, L$ at $300 \, K$. The amount of heat change (in $kJ / mol$) in the process is:

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