What happens to temperature in polytropic process?

Ans: In a polytropic process where PVn =constant, the temperature remains constant only when the polytropic index n = 1. For n = 1: PV = C: Under the Assumption of Ideal Gas Law, The PV = C represents the Constant Temperature or Isothermal Process.

Is there heat transfer in a polytropic process?

The term “polytropic” was originally coined to describe any reversible process on any open or closed system of gas or vapor which involves both heat and work transfer, such that a specified combination of properties were maintained constant throughout the process.

Why is work done negative in polytropic process?

The temperature decreases with heat addition only for i.e. specific heat is negative. It is because, to execute a polytropic process with those values of ‘n’ the system should work more than the heat added or more work should be done on the system than the heat removed from it.

What is constant in polytropic process?

A polytropic process is one where the pressure and volume of a system are related by the equation PVn= C. Where P represents the pressure, V represents the volume, n represents the polytropic index, and C is a constant.

How do you find the heat capacity of a polytropic process?

With the coefficient of polytropic $n = \left( {1 – \gamma } \right)K + \gamma $ . ${C_m}$ (molar heat capacity) of an ideal gas is given by ${C_m} = {C_{V,m}} + \dfrac{R}{{\left( {1 – n} \right)}}$.

Which of the following processes are polytropic processes?

Polytropic processes involve expansion, compression, heat transfer processes as functions of pressure and volume.

When heat is added to the water and if its temperature does not change the heat added is called?

latent heat, energy absorbed or released by a substance during a change in its physical state (phase) that occurs without changing its temperature.

How is polytropic process related to isobaric process?

All the standard processes like isobaric, isochoric, adiabatic, and isothermal processes belong to the category of polytropic process. Polytropic process equation can be used to describe various compression and expansion processes which include heat transfer. It corresponds to isobaric i.e constant pressure process.

What is value of C in polytropic process?

Hint:We have to know that a polytropic process is a thermodynamic process which follows the relationship: $p{V^n} = C$ . Here p represents pressure, V represents volume and n is the polytropic index, and C represents constant.

What is C in polytropic process?

A polytropic process is a thermodynamic process that obeys the relation: where p is the pressure, V is volume, n is the polytropic index, and C is a constant. The polytropic process equation can describe multiple expansion and compression processes which include heat transfer.

Why is the specific heat of polytropic process negative?

This expression shows that specific heat of polytropic process is negative only for n values in the interval ( 1, γ). It is negative because, to execute such a process with n ϵ ( 1, γ), more work should be done by the system than the heat added or more work should be done on the system than the heat removed.

What is the physical and physical significance of polytropic process?

Now, coming to the physical significance, though the heat is added in polytropic process, the temperature is getting reduced, because the work output is more than heat input, which implies that, the extra work is extracted from the internal energy, which in turn results in decrease in temperature of the body.

Can heat transfer be negative or positive?

Heat transfer is either zero, positive or negative, depending on the polytropic index of the process. Please refer here: Polytropic process. An example: Case of polytropic index (n) greater than gamma (ratio of specific heats) happens within a “polytropic compression” process like gas through a centrifugal compressor.

What is the heat transfer in heat transfer?

Heat transfer is either zero, positive or negative, depending on the polytropic index of the process. An example: Case of polytropic index (n) greater than gamma (ratio of specific heats) happens within a “polytropic compression” process like gas through a centrifugal compressor.