A cylinde with a piston in contact with a heat reservoir at 353 k.

In summary, the conversation discusses a cylinder with a piston in contact with a heat reservoir at 353 K. The gas is kept at a constant temperature and pressure of 1.01 x 10E5 N/m^2, and is allowed to expand by 1.5E-5 m^3. The question is how much heat the gas absorbs, and one person suggests using the formula p x v = w and w = q to calculate an answer of 1.15 J. Another person mentions that the temperature of the reservoir may need to be used, but since the pressure and temperature are constant, the change in volume only depends on the work done by the gas. The conversation ends with the suggestion that the temperature could
  • #1
calculusisrad
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A cylinde with a piston in contact with a heat reservoir at 353 k. While keeping this gas at constant temp and pressure of 1.01 x 10E5 n/m2 we permit he gas to expand by 1.5E-5 m3. How much heat does the gas absorb?

Is it just p x v = w and w = q to get an answer of 1.15 j? Cause i feel like the temp of the reservoir needs to be used somehow...
 
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  • #2


the pressure and temperature is constant. So, the change in volume only depends on the work done by the gas and the constant pressure.

Work=integral of pressure times dV

So, yea, since the gas absorbs some heat, the particles will expand to a new volume and a dV of 1.5E-5m^3

If your calculations are correct, then you are fine.

The temperature would be used to calculate the amount of moles of the gas and other factors. They are letting you off easy on this. What physics are you in?
 

Related to A cylinde with a piston in contact with a heat reservoir at 353 k.

1. What is a cylinder with a piston in contact with a heat reservoir at 353K?

A cylinder with a piston in contact with a heat reservoir at 353K is a thermodynamic system in which a piston is located inside a cylinder that is in contact with a heat reservoir at a constant temperature of 353K. The cylinder and piston form a closed system that allows for the transfer of heat energy between the heat reservoir and the system.

2. How does a cylinder with a piston in contact with a heat reservoir at 353K work?

This system works by allowing for the transfer of heat energy from the heat reservoir at 353K into the cylinder and piston. The piston, which is free to move, expands or contracts based on the amount of heat energy it receives from the heat reservoir. This expansion or contraction can then be used to perform work or to measure the amount of heat energy transferred.

3. What is the purpose of a cylinder with a piston in contact with a heat reservoir at 353K?

The purpose of this system is to study the relationship between heat and work, as well as to measure the amount of heat energy transferred. It is commonly used in thermodynamics experiments and can provide valuable insights into the behavior of thermodynamic systems.

4. How is the temperature of the heat reservoir maintained at 353K in this system?

The heat reservoir is typically a large thermal bath that is capable of maintaining a constant temperature of 353K. This can be achieved through various methods, such as using a heating element or a refrigeration unit, depending on the specific setup of the system.

5. Are there any limitations to using a cylinder with a piston in contact with a heat reservoir at 353K for studying thermodynamics?

While this system is useful for studying thermodynamics, it does have some limitations. For example, it assumes that the piston and cylinder are perfectly insulated, which may not be the case in real-world scenarios. Additionally, it does not take into account any external factors or energy losses that may affect the system, which can impact the accuracy of the results obtained.

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