Eg 2. A certain amount of an ideal gas, when it goes through some process and its temperature rises, what is true based on the laws of thermodynamics [ C (1) The ideal gas system absorbs heat in the process; (2) Positive work is done to the ideal gas system in the process; (3) The internal energy of the ideal gas system is increased; (4) In this process, the ideal gas system absorbs heat from the outside and does positive work to the outside. (A) (1) , (3); (B) (2) , (3); (C) (3); (D) (3) , (4).

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Eg 2, A certain amount of an ideal gas, when it goes through
some process and its temperature rises, what is true based on the
laws of thermodynamics [ C ]
(1) The ideal gas system absorbs heat in the process;
(2) Positive work is done to the ideal gas system in the process;
(3) The internal energy of the ideal gas system is increased;
(4) In this process, the ideal gas system absorbs heat from the
outside and does positive work to the outside.
(A) (1) , (3); (B) (2) , (3); (C) (3); (D) (3), (4).
the first law of thermodynamics: Q=AE+W
Q = yC,AT; AE = yC,AT
W = [ PaV = Q-AE
Eg 3, An adiabatic container is divided into two parts of equal
volume by an adiabatic plate of negligible mass. H, and O, of
equal mass and same temperature are filled on both sides. The
adiabatic plate P is fixed at the beginning, and then released to
make the plate P move (ignoring air leakage and friction). After
reaching a new equilibrium position, if the temperature of the
two sides is compared [ B ]
(A)H, is hotter than O,;
(C) The temperature on both sides is equal to the original
(B) 0, is hotter than H,;
temperature;
(D) The temperature on both sides is equal and lower than the
original temperature.
m
PV =
M
With the same mass and small molar mass, the pressure is strong. Therefore,
the adiabatic plate initially moves from hydrogen to oxygen. As hydrogen
performs positive work on oxygen, the internal energy of hydrogen
decreases and the internal energy of oxygen increases, the corresponding
RT
temperature of hydrogen decreases and the temperature of oxygen increases.
Eg 4 The volume of an oxygen cylinder is V, the pressure of
oxygen filling is P, and the pressure drops to P, after a period
of use. Then the ratio of the internal energy of oxygen in the
cylinder to that of oxygen before it is used is
P : P2
Transcribed Image Text:Eg 2, A certain amount of an ideal gas, when it goes through some process and its temperature rises, what is true based on the laws of thermodynamics [ C ] (1) The ideal gas system absorbs heat in the process; (2) Positive work is done to the ideal gas system in the process; (3) The internal energy of the ideal gas system is increased; (4) In this process, the ideal gas system absorbs heat from the outside and does positive work to the outside. (A) (1) , (3); (B) (2) , (3); (C) (3); (D) (3), (4). the first law of thermodynamics: Q=AE+W Q = yC,AT; AE = yC,AT W = [ PaV = Q-AE Eg 3, An adiabatic container is divided into two parts of equal volume by an adiabatic plate of negligible mass. H, and O, of equal mass and same temperature are filled on both sides. The adiabatic plate P is fixed at the beginning, and then released to make the plate P move (ignoring air leakage and friction). After reaching a new equilibrium position, if the temperature of the two sides is compared [ B ] (A)H, is hotter than O,; (C) The temperature on both sides is equal to the original (B) 0, is hotter than H,; temperature; (D) The temperature on both sides is equal and lower than the original temperature. m PV = M With the same mass and small molar mass, the pressure is strong. Therefore, the adiabatic plate initially moves from hydrogen to oxygen. As hydrogen performs positive work on oxygen, the internal energy of hydrogen decreases and the internal energy of oxygen increases, the corresponding RT temperature of hydrogen decreases and the temperature of oxygen increases. Eg 4 The volume of an oxygen cylinder is V, the pressure of oxygen filling is P, and the pressure drops to P, after a period of use. Then the ratio of the internal energy of oxygen in the cylinder to that of oxygen before it is used is P : P2
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