Problem 1: A syringe which is covered at the end starts with 50 mL of air at 1 atm. The temperature of the gas is 15°C. A. How many moles of gas are in the syringe? B. If the temperature of the gas in the syringe is now heated to 25°C and the plunger is held in place at 50 mL, what is the new pressure inside the syringe? C. If the syringe is now let go and the gas is allowed to expand, what is the new volume that it expands to? D. How much work was done by the gas on the syringe?
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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