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Reversible adiabatic expansion/compression
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∙ 11y ago
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Explain how you might keep a gas at a constant temperature during a thermodynamic process?
1. You'd have to add heat at precisely the same rate that the gas is doing work.
Which thermodynamic process takes place when work is done on the system but no energy is transferred to or from the system as heat?
If work is done on a system as compression work and no heat interaction is allowedbetween the system and the surroundings, then you have an adiabatic compression.
Measure of the amount of energy in a thermodynamic system unavailable for doing work?
Entropy
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:
When is a thermodynamic work said to be positive?
In thermodynamics, work done by a system on its surroundings or another system is said to be positive.
What is the maximum amount of work that a gas can do during a constant-volume process?
Zero work.
Explain how you might keep a gas at a constant temperature during a thermodynamic process?
1. You'd have to add heat at precisely the same rate that the gas is doing work.
Which thermodynamic process takes place when work is done on the system but no energy is transferred to or from the system as heat?
If work is done on a system as compression work and no heat interaction is allowedbetween the system and the surroundings, then you have an adiabatic compression.
Can you put the word thermodynamic is a sentence?
yes the word "thermodynamic" can be called a sentence. "THERMO" means heat and "DYNAMICS means motion or movement. -Thermodynamic refers to the study of heat and temperature and their relation to energy and work.
Measure of the amount of energy in a thermodynamic system unavailable for doing work?
Entropy
Which process is needed for chlorophyll to work?
Photosynthesis is the process needed for chlorophyll to work. Chlorophyll is a chemical inside a plant which gives plants their green color.
Which law of thermodynamics applies to percent of harvested energy?
The 2nd law of thermodynamics can yield predictions on the maximum efficiency of a process that seeks to extract useful energy. An example would be the Carnot cycle which gives the maximum percent of energy that can be harvested and turned into useful work as heat moves from a heat source to a heat sink.
Is the heat supplied to a system always equal to the increase in its internal energywhat thermodynamic variable is defined by zeroth law and first law of thermodynamic?
The heat supplied to a system can increase its internal energy if no work is extracted from the system. If any work is done by the system, then the increase in internal energy will be less than the heat supplied to the system. The thermodynamic variable defined by the zeroeth law is Temperature.
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:
When is a thermodynamic work said to be positive?
In thermodynamics, work done by a system on its surroundings or another system is said to be positive.
What is the maximum work obtainable from two bodies at temperatures T1 and T2 . i need derivation. pls help you out?
To obtain the maximum work/time (power) from two bodies at different temperatures, you have to put an "Ideal" Heat Engine between the two bodies. The Heat Engine works with the "Carnot Thermodynamic Cycle". The Heat Efficiency of the Carnot Cycle Engine is called "Carnot Efficiency" and it only depends on the Absolute Temperature of the two bodies. Absolute Temperature also known as Thermodynamic Temperature will be in Rankine degrees, oR, (U.S.C.S.), or Kelvins (I.S.). The Carnot Heat efficiency is given by; eff (%) = [1 - TL/TH] x 100 where TH and TL are the High and Low Thermodynamic Temperatures of the bodies. So if a given Carnot Efficiency turns out be of 35%, this means that from the heat given by the High Temperature body, 35% is converted to work and the rest is dumped to the Low Temperature body.
When you measure friction you measure the amount of this?
Useful work lost to entropy. according to wiki, entropy = a thermodynamic property that is a measure of the energy not available for useful work in a thermodynamic process, such as in energy conversion devices, engines, or machines. Such devices can only be driven by convertible energy, and have a theoretical maximum efficiency when converting energy to work. During this work entropy accumulates in the system, but has to be removed by dissipation in the form of waste heat. thus I think the previous answer used a complicated terminology in an over-simplified response. Friction is usually referred to as a natural existing force against which a new opposing force has to be applied to achieve work so when friction is present, more (usually man-made) force has to be applied to achieve the same work. Generally computed as a coefficient of friction regarding the surface attraction between the surface the object is to be moved across and the object, and in computation is product of its mass & gravity
