What are thermodynamic processes?
(N/A) Thermodynamic processes are defined as follows:
$(1)$ Isothermal process: The process during which the temperature of the system remains constant.
$(2)$ Isobaric process: The process during which the pressure of the system remains constant.
$(3)$ Isochoric process: The process during which the volume of the system remains constant.
$(4)$ Adiabatic process: $A$ process in which a system undergoes physical changes such that no heat is exchanged between the system and its surroundings $(\Delta Q = 0)$.
$(5)$ Cyclic process: $A$ process in which a system undergoes a series of changes that return the system back to its initial state.
Some special thermodynamic processes are summarized in the table below:
$(1)$ Isothermal process: The process during which the temperature of the system remains constant.
$(2)$ Isobaric process: The process during which the pressure of the system remains constant.
$(3)$ Isochoric process: The process during which the volume of the system remains constant.
$(4)$ Adiabatic process: $A$ process in which a system undergoes physical changes such that no heat is exchanged between the system and its surroundings $(\Delta Q = 0)$.
$(5)$ Cyclic process: $A$ process in which a system undergoes a series of changes that return the system back to its initial state.
Some special thermodynamic processes are summarized in the table below:
| Type of process | Feature |
| Isothermal | Temperature constant |
| Isobaric | Pressure constant |
| Isochoric | Volume constant |
| Adiabatic | No heat flow $(\Delta Q = 0)$ |
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An ideal monoatomic gas is carried around the cycle $ABCDA$ as shown in the figure. The efficiency of the gas cycle is
Two gases have the same initial pressure,volume,and temperature. They expand to the same final volume,one adiabatically and the other isothermally.
Match the following:
Column $I$ Column $II$ $A$. Ratio of $\frac{\Delta Q}{\Delta U}$ in an isobaric process $1$. $\frac{T_1}{T_1-T_2}$ $B$. Ratio of $\frac{\Delta Q}{\Delta W}$ in an isobaric process $2$. $\frac{T_2}{T_1-T_2}$ $C$. Coefficient of performance of a refrigerator $3$. $\frac{\gamma}{\gamma-1}$ $D$. Coefficient of performance of a heat pump $4$. $\gamma$
Codes:
$A \quad B \quad C \quad D$
| Column $I$ | Column $II$ |
| $A$. Ratio of $\frac{\Delta Q}{\Delta U}$ in an isobaric process | $1$. $\frac{T_1}{T_1-T_2}$ |
| $B$. Ratio of $\frac{\Delta Q}{\Delta W}$ in an isobaric process | $2$. $\frac{T_2}{T_1-T_2}$ |
| $C$. Coefficient of performance of a refrigerator | $3$. $\frac{\gamma}{\gamma-1}$ |
| $D$. Coefficient of performance of a heat pump | $4$. $\gamma$ |
Codes:
$A \quad B \quad C \quad D$
The three processes in a thermodynamic cycle shown in the figure are: Process $1 \rightarrow 2$ is isothermal; Process $2 \rightarrow 3$ is isochoric (volume remains constant); Process $3 \rightarrow 1$ is adiabatic. The total work done by the ideal gas in this cycle is $10 \, J$. The internal energy decreases by $20 \, J$ in the isochoric process. The work done by the gas in the adiabatic process is $-20 \, J$. The heat added to the system in the isothermal process is .............. $J$.
MediumKVPY 2013
View SolutionIn thermodynamic processes,which of the following statements is not true?
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