0
W= -Pext(Vf-Vi)
(-) Work denotes expansion
(+) work denotes compression
Pext is external pressure
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Work done in a free expansion process is?
zero. because in free expansion volume of gas increase against any resistance.
Why does the gas in the refrigerator cause cooling on expansion?
Heat of the gas is lost as work done by the gas.
What is the difference between isobaric and isochoric process?
An isobaric process is a thermodynamic-processin which the pressure stays constant: Δp = 0 The term derives from the Greek isos, meaning "equal," and barus, "heavy." The heat transferred to the system does work but also changes the internal energy of the system:
What is isobaric volume coefficient of expansion?
Volume coefficient of expansion of air varies with temperature... At STP( ie 1 bar,0 °C) it is about 3.7e-3/°C (.0037/°C) At 100°C it is about .002/°C Try checking the exact values in Clark's tables, log/scientific book.
What is isobaric process?
The process in which change in volume and temperature takes place at a constant pressure is called an isobaric process
What is isobaric pressure?
constant pressure where Work is done through P(Vf-Vi)
Work done is not a state function?
In mechanics,work done(work=force.displacement of body) by a body is independent of path.It only depends on the initial and final state of the body.However in thermodynamics,the work done by an ideal gas(work=pressure.change in volume of gas) depends on the path taken(isochoric,isothermal,isobaric,adiabatic)
What is free expansion in thermodynamics?
In free expansion, the external pressure is zero, i.e. work done is zero. Accordingly, free expansion is also called irreversible adiabatic expansion.
Work done in a free expansion process is?
zero. because in free expansion volume of gas increase against any resistance.
Why does the gas in the refrigerator cause cooling on expansion?
Heat of the gas is lost as work done by the gas.
What is the temperature if the gas pressure is constant?
At isobaric (pressure) expansion (volume increase) the temperature will increase because V is proportional to T for the same amount of gas (closed container) at constant pressure.
What are the isobaric patterns on a facsimile?
adafaf
What economic factor led the expansion of slavery in British America?
The increase of work that needed to be done on tobacco plantations.
What is the difference between isobaric and isochoric process?
An isobaric process is a thermodynamic-processin which the pressure stays constant: Δp = 0 The term derives from the Greek isos, meaning "equal," and barus, "heavy." The heat transferred to the system does work but also changes the internal energy of the system:
McDonald's illustrates this form of business expansion?
Expansion is done by franchise.
Why cp and cv have different values?
Cv is a for a constant volume, and there is therefore no work done in the expansion whereas as Cp accounts for the work done by the gas during its expansion, as well as the change in its internal energy. Thusly Cp is generally bigger than Cv. Intuitively this would be very simple to work out yourself. We used to have to work this out ourselves back in my day, not just resort to cheap answers on the interweb.
Expansion happens because?
there is too much pressure in a system. example, a system which has done work and releases heat will expand itself
