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Can work done on a system decrease its thermal energy?
Yes. As an example: if you define a refrigerator as your system, the work done on the system causes heat to be expelled from the system to the surroundings. The net heat expelled will be equal to the work input plus the decrease in its thermal energy.
If work is don adiabatically on a system will the internal energy increase or decrease?
If work is done adiabatically on a system, the internal energy will increase. This is because adiabatic processes do not involve the exchange of heat with the surroundings, so any work done on the system will directly contribute to an increase in its internal energy.
The amount of work done per unit of time?
Work done per unit of time is defined as power. In the metric system, this unit is a watt. In the standard system, it is horsepower.
Give examples of the first law of thermodynamics in which no work is done on the system?
Work can be calculated as an integral of PdV, so if volume doesn't change (dV = 0) there is no work. Changing the temperature of an isochoric system involves no work on or by the system - unless you are moving the system around like lifting it or lowering it or shoving it or decellerating it.
When is work done positive?
There are two conventions. One says that work done on the system is positive, the other says that work done by the system is positive. Chemists tend to use the former, physicists tend to use the latter... one of several reasons it's not a good idea to take thermodynamics in chemistry and physics at the same time.
Can work done on a system decrease its thermal energy?
Yes. As an example: if you define a refrigerator as your system, the work done on the system causes heat to be expelled from the system to the surroundings. The net heat expelled will be equal to the work input plus the decrease in its thermal energy.
Work done on the system is?
work done on the system: when a surrounding does work on the system the total energy increases so work done is positive..........
Is the work done by the system is considered as positive or on the system is considered as positive?
Work done by the system is considered as PositiveWork done on the system is considered as Negative
Expansion happens because?
there is too much pressure in a system. example, a system which has done work and releases heat will expand itself
How is work related to the conservation of mechanical energy?
Work equals the change in energy, in a closed system energy is not lost. So in a closed system any work done will be countered by an equal and opposite work. An example is throwing a ball up into the air and catching it again. The work done by you to accelerate it is equal and opposite to the work done by the earth.
How do you determine a work done is positive sign or negative sign?
If work is done on the system then it has a negative sign. If work is done by the system then it has a positive sign.
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.
Give five example each of the situation when the work is done or when the work is not done?
give me a 5 situation that work is done
Can work be done on a system if there is no motion?
no
A energy is?
Energy is the potential to do some work. If there is work done on a system, this work done is stored as potential energy of the system. If the system in motion, it should have kinetic energy. Hence total energy of the system PE+KE
When do you say that the work done is positive or negative?
There are different conventions as to what work is negative and what work is positive. The convention used by engineers and physicists is that work done BY the system on its surroundings is positive while work done ON the system by its surroundings is negative. Chemists reverse these conventions.
Why work done on the system is negativeand it is positive when its done by the system?
First, there are certain sign conventions. It could be defined in a different way, but things are traditionally done in a certain way. Second, if work going out of the system is defined as positive, then it is quite logical that work going into a system should have the opposite sign.
