In which of the following situations is it impossible to predict whether the pressure of a gas will increase, decrease, or stay the same without doing mathematical calculations? a) A gas sample is cooled, and the volume of the gas decreases. b) Additional gas is added to the gas sample. | c) A gas sample is cooled. d) A gas sample is heated, and the volume of the gas decreases. e) A gas sample is heated, and some of the gas is added.

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Kinetic-Theory of Gases

Kinetic theory of gases is the model or method which was developed in the 19th century by Maxwell and Boltzmann. This is possible as the interatomic force which is of short-range forces that are important for solids and liquids can be neglected for gases. This theory or gas law gives a molecular interpretation of the pressure and temperature of a gas and is consistent with gas laws and Avogadro’s hypothesis. This theory is very helpful to correctly explain the specific heat capacities of many gases, kinetic energy and it also explains the transport qualities such as viscosity, thermal conductivity, and diffusion with molecular parameters. As stated in the kinetic-molecular theory, the temperature of a substance or gas particle is related to the average kinetic energy of the particles of that substance. When a substance is heated, some of the absorbed energy is stored within the particles, while some of the energy increases the motion of the particles, called average kinetic energy.