Form of the first law for a special process (isothermal, adiabatic, isochoric, isobaric)

1. A.
   $q=w=500\text{ J},\,\Delta U=0$
2. B.
   $q=\Delta U=500\text{ J},\,w=0$
3. C.
   $q=\Delta U=-500\text{ J},\,w=0$
4. D.
   $q=500\text{ J},\,\Delta U=w=0$

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1. A.
   $\Delta H$
2. B.
   $dq$
3. C.
   $\Delta S$
4. D.
   $\Delta U$

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1. A.
   $\Delta U = 0$
2. B.
   $-\Delta U = -W$
3. C.
   $\Delta U = Q$
4. D.
   $Q_P = \Delta U + P_{ext}\Delta V$

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1. A.
   $\mathrm{W = -Q}$
2. B.
   $\mathrm{-\Delta U = -W}$
3. C.
   $\mathrm{\Delta U = Q_v}$
4. D.
   $\mathrm{Q_p = \Delta U + P_{ext}\Delta V}$

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1. A.
   $W = -Q$
2. B.
   $-\Delta U = -W$
3. C.
   $\Delta U = QV$
4. D.
   $\Delta U = Q_P - P_{\mathrm{ext}}\Delta V$

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1. A.
   Adiabatic
2. B.
   Isothermal
3. C.
   Isochoric
4. D.
   Isobaric

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1. A.
   No work is done during the process.
2. B.
   Heat is transferred, but no mechanical work occurs.
3. C.
   Work done by or on a system exactly equal in magnitude and opposite in sign to a heat transfer.
4. D.
   There is a change in internal energy of the system throughout the process.

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