4. The kinetic theory of gases predicts that, at a given temperature, a) All of the molecules in a gas have the same average speed. b) All of the molecules in a gas have the same average energy. 1 c) Light gas molecules have lower average energies than heavy gas molecules. d) Light gas molecules have higher average energies than heavy gas molecules. 5. According to the first law of thermodynamics, if the gas compressed adiabatically its temperature will: a) Increase. b) Decrease. c) Not change. d) None of the above. The boundary work W, for an isochoric process is: a) Positive. b) Negative. c) Zero. d) None of the above.
Kinetic Theory of Gas
The Kinetic Theory of gases is a classical model of gases, according to which gases are composed of molecules/particles that are in random motion. While undergoing this random motion, kinetic energy in molecules can assume random velocity across all directions. It also says that the constituent particles/molecules undergo elastic collision, which means that the total kinetic energy remains constant before and after the collision. The average kinetic energy of the particles also determines the pressure of the gas.
P-V Diagram
A P-V diagram is a very important tool of the branch of physics known as thermodynamics, which is used to analyze the working and hence the efficiency of thermodynamic engines. As the name suggests, it is used to measure the changes in pressure (P) and volume (V) corresponding to the thermodynamic system under study. The P-V diagram is used as an indicator diagram to control the given thermodynamic system.
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