Question

In: Chemistry

Adiabatic process.

In an adiabatic expansion of a gas,what is the effect on its temperature :

 

Solutions

Expert Solution

For the adiabatic process of gas, the heat is kept zero.

In the adiabatic expansion of the gas, the work done by the gas is always positive.

 

Since the work done by the gas is positive the internal energy decreases, so the temperature of the gas also decreases.

Formula used:

The first law of Thermodynamics, Q = (Uf−Ui)+W,

where Q = Heat gain or loss in a system,

(Uf−Ui) = Change in internal energy of the gas.

W= Work done by the gas.

 

 


In an adiabatic expansion of gas,its temperature decreases.

Related Solutions

It is known that the following relations are valid for a reversible, adiabatic process in an...
It is known that the following relations are valid for a reversible, adiabatic process in an ideal gas: Tv^(gamma-1) = constant, Pv^gamma = constant, where gamma = Cp/Cv. how do these relations look for a van der waals gas?
Prove that the adiabatic process of an ideal gas in a simple compressible closed system is...
Prove that the adiabatic process of an ideal gas in a simple compressible closed system is the polytropic process of n=k ( where k is the specific heat rate) by using the thermodynamic first law. Please answer quickly will rate positive thank u
Describe the process of “magnetic cooling” (adiabatic demagnetization) for a paramagnetic salt in words (how and...
Describe the process of “magnetic cooling” (adiabatic demagnetization) for a paramagnetic salt in words (how and why does it work?). Illustrate this process in an entropy - temperature diagram.
Which one has a larger final entropy, reversible isothermal process or reversible adiabatic process when expanding...
Which one has a larger final entropy, reversible isothermal process or reversible adiabatic process when expanding to the same final volume for an ideal gas? What do you assume the entropy S for a perfect crystal when T = 0? Is the S(0) still zero if the crystal is not perfect? Why? How to calculate dS when under the constant pressure and cp is given? How to calculate the entropy of H2O at 500 K? How to calculate the entropy...
Prove for an adiabatic TP ^ 1-gamma / gamma = constant process. Use the first law...
Prove for an adiabatic TP ^ 1-gamma / gamma = constant process. Use the first law of thermodynamics.
How do you perform adiabatic flash calculations?
How do you perform adiabatic flash calculations?
For ethanol liquid with 50% excess of air. Determine adiabatic flame temperature
For ethanol liquid with 50% excess of air. Determine adiabatic flame temperature
Air is expanded isentropically in an adiabatic turbine, to produce 135 kW of power. If the...
Air is expanded isentropically in an adiabatic turbine, to produce 135 kW of power. If the mass flow rate is 0.75 kg/s, and the air at the exit is 500 K and 305 kPa, then what is the temperature and pressure at the inlet of the turbine? (a) The temperature is K. (b) The pressure is kPa. NOTE: Do NOT approximate the air as having a constant specific heat.
Determine the adiabatic combustion temperature at constant pressure and at constant volume for two of the...
Determine the adiabatic combustion temperature at constant pressure and at constant volume for two of the fuels of personal choice. Graphically show that this corresponds to the product temperature where the heat of reaction is zero.
1. Derive PV^Gamma = constant 2. All adiabatic relations
1. Derive PV^Gamma = constant 2. All adiabatic relations
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT