Therefore, isothermal expansion is
the increase in volume under constant-temperature conditions
. During isothermal conditions, the change in internal energy ΔU is 0 for only an ideal gas, so efficient work done is entirely transformed into efficient heat flow.
Is an isothermal expansion of an ideal gas select wrong statement?
There is no change in the temperature
of the gas.
Which of the following is correct for isothermal expansion of an ideal gas into vacuum?
q
v
implies that the heat is supplied at a constant volume. When an ideal gas is subjected to isothermal expansion (
∆T = 0
) in vacuum the work done w = 0 as p
ex
=0. As determined by Joule experimentally q =0, thus ∆U = 0.
Which of the following is correct for adiabatic expansion of ideal gas?
Therefore, $W = 0$, $q = 0$ and $Delta T = 0$ for free expansion of an ideal gas under adiabatic condition. Therefore, Option (
C
) is correct.
What is isothermal gas expansion?
One condition, known as an isothermal expansion,
involves keeping the gas at a constant temperature
. … The gas cools, even though there is no heat flow, because it is doing work at the expense of its own internal energy. The exact amount of cooling can be calculated from the heat capacity of the gas.
What is Q for an isothermal expansion?
An isothermal process is a change of a system, in which the temperature remains constant: ΔT = 0. … “) In other words, in an isothermal process, the value ΔT = 0 but
Q ≠ 0
, while in an adiabatic process, ΔT ≠ 0 but Q = 0.
Is ideal gas expansion reversible?
The work of a
reversible
expansion of an ideal gas is fairly easy to calculate. If the gas expands reversibly, the external pressure (pext) can be replaced by a single value (p) which represents both the pressure of the gas and the external pressure.
What is the specific heat of gas in isothermal process?
The specific heat of a gas in an adiabatic process is zero but
it is infinite
in an isothermal process.
In which process the work done is zero?
Isochoric process
: It is a thermodynamic process which takes place at constant volume. In such a process, the work done is zero. The volume of the gas remains constant.
Which of the following is wrong change in internal energy of an ideal gas on isothermal expansion is zero?
During isothermal expansion of an ideal gas, there is
no change
in the internal energy. … During isothermal expansion of an ideal gas , as temperature remains constant, no heat enters or leaves the system.
Which is correct for adiabatic process?
An adiabatic process is a thermodynamic process in which there is no exchange of heat from the system to its surrounding neither during expansion nor during compression. An adiabatic process either can be reversible or irreversible. … Thus, in that condition only, for an adiabatic process,
q = 0, δv=0 and δT=0
.
Which one of the following is correct for free expansion?
For the free expansion of an ideal gas, the
opposing force is zero
, hence work done = 0.
Which equation is correct for adiabatic process?
For such an adiabatic process, the modulus of elasticity (Young’s modulus) can be expressed as
E = γP
, where γ is the ratio of specific heats at constant pressure and at constant volume (γ = C
p
C
v
) and P is the pressure of the gas.
Is isothermal expansion positive or negative?
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What happens when gas is compressed?
During compression,
the volume (V) of a gas decreases
. When this happens, the pressure (P) of the gas increases if the number of moles (n) of gas remains constant. If you keep the pressure constant, reducing the temperature (T) also causes the gas to compress.
What happens to volume in isothermal expansion?
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Therefore, the heat transferred into the system is equal to the work done on the system by the surroundings. If we plot an isothermal process on the xy plane, we see that
as the pressure increases, the volume will decrease and as the pressure decreases, the volume will increase
.
