0
When the system does work on the surroundings what is the sign of work?
Wiki User
∙ 8y agoWant this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
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 difference between isolated system and non flow adiabatic system?
An isolated system is a system that doesn't not interact with its surroundings. No interactions at all. No work, no heat transfer. An adiabatic system is one that does not permit heat transfer between the system and its surroundings. It can do work on the surroundings.
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.
A system that does no work but which receives heat from the surroundings has?
A lower temperature.
What is it called when a substance releases energy to its surroundings?
There are two ways that a substance ( called the System ) may release energy to the Surroundings :( 1 ) Heat may be released by heat transfer from the System to the Surroundings. Heat transfer from the System to the Surroundings requires the System temperature to exceed the temperature of the Surroundings and the presence of one or more heat transfer modes ( conduction, convection, and/or radiation.( 2 ) Work done by the System of on the Surroundings corresponding to a force moving through a distance, such as when the substance expands. Substance confined to a cylinder with a piston may expand, doing work on the Surroundings.
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.
What signs on q and w represent a system that is doing work on the surroundings as well as losing heat to the surroundings?
q=+,w=-
Is flying bird open system or closed system or isolated system according to thermodynamics?
The bird will be best represented as an open system if you include the respiration of the bird and the feathers it drops occasionally. If you neglect those factors you could represent it as a closed system. It will NOT be an isolated system since it does work on its surroundings and its surroundings do work on it - along with some amount of heat transfer from the bird to its surroundings.
What is work in chemistry?
Work is energy lost from a contained system.
A system gives off 196KJ of heat to the surroundings and the surroundings do 420 KJ of work on the system What is the change in internal energy of the system?
Δ E = -196 kj + 420 kJ = 224 kJ
You say all systems try to go to their stabler state and the Entropy of Universe is increasing how do you justify both the statements?
The state of maximum entropy of a system is the state when all the energy available to a system to do work is dissipated and is evened out with that of the surroundings. Therefore, the ability to do work relates to the difference in energy levels between a system and its surroundings. A system will carry on working for as long as there is energy difference between it and its surroundings. When the energy of a system and its surroundings evens out, the system ceases to function. All functional systems try, but fail to reach that equilibrium. The Universe as a system is no different. However, the energy which causes the universe to expand -- termed dark energy, which source remains unknown, cause the Universe to do work on its surroundings. Therefore, as a system, the Universe must receive or must have received its energy from its surroundings.
What is the change in the internal energy of a system that absorbs 2.500J of heat and that does 7.655J of work on the surroundings is?
5.155
