Thermodynamics Graphs

Thermodynamic Processes

by Juan Restrepo

​in which P is Absolut pressure (Instead of gauge pressure), V is the volumen of the gas, n is the amount of particles measured in moles, T is absolut temperature (measured in Kelvin), and R is just a constant with a value of 8.314J/mol*K.

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​Thermodynamic process

• ​A thermodynamic process is defined as a change from one equilibrium macrostate to another macrostate.

​Types of Processes:

​Isochoric (Isocóricos, Isovolumetricos o Isométricos in spanish):

​Volume is constant. (V=cte)

​Isobaric (Isobáricos) The Pressure remains constant. (P=cte)

​Isothermic : Temperature remains constant. (T=cte)

​Adiabatic: There is no heat entering or leaving the system. (Q=0)

​ISOCHORIC (V=cte)

​Isobaric Process (P=cte)

​Isothermic (T=Cte)

​A line in the PV graph in which the temperature Is constant is called an Isothermal

​Adiabatic (Q=0)

​Thermodynamic cycle

​A thermodynamic cycle consists of a linked sequence of thermodynamic processes that involve transfer of heat and work into and out of the system, while varying pressure, temperature, and other state variables within the system, and that eventually returns the system to its initial state.

Multiple Choice

In which of the following systems, no matter, but only heat is exchanged between system and surrounding?

• Open system

• Closed system

• Isolated system

Multiple Choice

In which of the following systems, neither matter nor heat is exchanged between system and surrounding?

• Open system

• Closed system

• Isolated system

Multiple Choice

What name is given to the process that takes place at constant pressure

• Isobaric

• Isochoric

• Isothermal

• Adiabetic

Multiple Choice

What name is given to the process that takes place at constant volume

• Isobaric

• Isochoric

• Isothermal

• Adiabetic

Multiple Choice

What name is given to the process that takes place at constant temperature

• Isobaric

• Isochoric

• Isothermal

• Adiabetic

Multiple Choice

Name the thermodynamic process

• isobaric

• isovolumetric/isochoric

• isothermal

• adiabatic

Multiple Choice

Name the thermodynamic process

• isobaric

• isovolumetric/isochoric

• isothermal

• adiabatic

Multiple Choice

Name the thermodynamic process

• isobaric

• isovolumetric/isochoric

• isothermal

• adiabatic

Multiple Choice

Name the thermodynamic process

• isobaric

• isovolumetric/isochoric

• isothermal

• adiabatic

Multiple Choice

Name the thermodynamic process

• isobaric

• isovolumetric/isochoric

• isothermal

• adiabatic

Multiple Choice

Name the thermodynamic process

• isobaric

• isovolumetric/isochoric

• isothermal

• adiabatic

Multiple Choice

2.Internal energy depends on

• Only pressure

• Only Volume

• Only Temperature

• Only Mass

Multiple Choice

5. If work done on a system then work done is

• Positive

• Negative

• Zero

• Infinite

Multiple Choice

6. Area under P-V diagram gives

• Heat

• Internal energy

• Work done

• Temperature