Why is the molar specific heat of a gas at constant pressure larger than the molar specific heat at constant volume?
The value of molar specific heat at constant pressure is greater than the value of molar specific heat at constant pressure as the work done increases at constant pressure.
The molar specific heat defines through 1 Kelvin temperature, 1 mole substance heat will raise.
The work done is zero at a constant volume. Due to this reason, absorbing gas increases the internal energy of the gas.
At constant pressure, the absorbed gas raises up internal energy and work done in the gas. Due to this reason, the value of molar specific heat at constant pressure is larger than the value of molar specific gas at constant volume.
Your laboratory assignment for the week is to measure the specific heat ratio of carbon dioxide. The gas is contained in a cylinder with a movable piston and a thermometer. When the piston is withdrawn as far as possible, the cylinder's length is . You decide to push the piston in very rapidly by various amounts and, for each push, to measure the temperature of the carbon dioxide. Before each push, you withdraw the piston all the way and wait several minutes for the gas to come to the room temperature of . Your data are as follows:
Use the best-fit line of an appropriate graph to determine for carbon dioxide.
55. An diameter, well-insulated vertical cylinder containing nitrogen gas is sealed at the top by a frictionless piston. The air pressure above the piston is
a. What is the gas pressure inside the cylinder?
b. Initially, the piston height above the bottom of the cylinder is . What will be the piston height if an additional are placed on top of the piston?
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