https://padlet.com/tunlinaung_physics/w2o2b7u0niof Made with the help of a typing monkey en-us 2016-10-06 02:52:11 UTC 2024-08-14 12:28:00 UTC hello@padlet.com tunlinaung_physics https://padlet.com/tunlinaung_physics/w2o2b7u0niof/wish/128678945 A thermodynamic surroundings are defined as any part of the Universe under consideration.]]> 2016-10-06 03:01:28 UTC https://padlet.com/tunlinaung_physics/w2o2b7u0niof/wish/128678945 tunlinaung_physics https://padlet.com/tunlinaung_physics/w2o2b7u0niof/wish/128679051 Thermodynamic surroundings are defined as everything other than the thermodynamic system. In other words, the entire rest of the Universe. 
*Surrounding are assumed infinite and remain at constant T & P.
So, the vast size of the Universe validates this assumption.]]> 2016-10-06 03:02:53 UTC https://padlet.com/tunlinaung_physics/w2o2b7u0niof/wish/128679051 tunlinaung_physics https://padlet.com/tunlinaung_physics/w2o2b7u0niof/wish/128679173 The Universe is therefore the system plus its surroundin]]> 2016-10-06 03:04:17 UTC https://padlet.com/tunlinaung_physics/w2o2b7u0niof/wish/128679173 tunlinaung_physics https://padlet.com/tunlinaung_physics/w2o2b7u0niof/wish/128679321 *Universe, is a sphere of radius 46.6 billion light years.
1 light year = 9.46 quadrillion meters.
So, diameter of universe is 880 Ym. 1 Ym = 1*10^24.

]]> 2016-10-06 03:05:26 UTC https://padlet.com/tunlinaung_physics/w2o2b7u0niof/wish/128679321 tunlinaung_physics https://padlet.com/tunlinaung_physics/w2o2b7u0niof/wish/128680297 *The boundary may be actual or notional.
*It controls transfer of work, heat and matter from the system to the surroundings and vice-versa.
*The boundary may or may not impose restrictions on such transfers.]]> 2016-10-06 03:17:24 UTC https://padlet.com/tunlinaung_physics/w2o2b7u0niof/wish/128680297 tunlinaung_physics https://padlet.com/tunlinaung_physics/w2o2b7u0niof/wish/128680537 *An open system may exchange both energy and matter with its surroundings.
*A closed system may exchange energy but not matter with its surroundings.
*An isolated system may exchange neither energy nor matter with its surroundings.

]]> 2016-10-06 03:20:47 UTC https://padlet.com/tunlinaung_physics/w2o2b7u0niof/wish/128680537 tunlinaung_physics https://padlet.com/tunlinaung_physics/w2o2b7u0niof/wish/128680775 *A diathermic system allows heat flow into or out of the system.
*An adiabatic system prevents heat flow into or out of the system.]]> 2016-10-06 03:24:01 UTC https://padlet.com/tunlinaung_physics/w2o2b7u0niof/wish/128680775 tunlinaung_physics https://padlet.com/tunlinaung_physics/w2o2b7u0niof/wish/128680976 The state of a thermodynamic system is defined by a series of state functions. Generally, the change of the state of a system is accompanied by a change in it's state functions. It is however possible for a system to change state whilst on or more of it's states functions remains unchanged.]]> 2016-10-06 03:27:03 UTC https://padlet.com/tunlinaung_physics/w2o2b7u0niof/wish/128680976 tunlinaung_physics https://padlet.com/tunlinaung_physics/w2o2b7u0niof/wish/128681487 Isothermal implies constant temperature, T.
Isobaric implies constant pressure, P.
Isochoric implies constant volume, V.
State functions,
Pressure, p
Volume, V
Mass, m
Quantity, n
Internal Energy, U
Enthalpy, H
Entropy, S
Gibbs Energy, G]]> 2016-10-06 03:34:21 UTC https://padlet.com/tunlinaung_physics/w2o2b7u0niof/wish/128681487 tunlinaung_physics https://padlet.com/tunlinaung_physics/w2o2b7u0niof/wish/128681808 Functions governing transition between states are called path functions.
Heat, q and Work, w.
** A state function describes the current state of a system.**]]> 2016-10-06 03:40:33 UTC https://padlet.com/tunlinaung_physics/w2o2b7u0niof/wish/128681808 tunlinaung_physics https://padlet.com/tunlinaung_physics/w2o2b7u0niof/wish/128682088

Heat and Work are both forms of energy.

The state of a system is changed by the supply or removal of energy in the form of heat or work.

The difference between the two is that heat transfer achieves or utilizes random molecular motion. Whereas work energy transfer achieves or utilizes uniform, concerted molecular motion.

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