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In an irreversible process there is: a A loss of heat. B no loss of heat. C gain of heat. D no gain of heat.

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Question added by Alex Al Yazouri , General Manager , Al Mushref Cooperative Society
Date Posted: 2014/12/24

Answer "A" loss of heat.

That's because the energy during the irreversible process is converted into a heat.

Omair Abduljaleel Ali Al-Quliey
by Omair Abduljaleel Ali Al-Quliey , Design Engineer , Quliey Office for constructions

Thanks En.Alex ...

"A" loss of heat ..

Elke Woofter
by Elke Woofter , Project Assistant , American Technical Associates

Since this is a transfer of heat ... I would have to say  A and D

"In science, a process that is not reversible is called irreversible. This concept arises most frequently in thermodynamics.

In thermodynamics, a change in the thermodynamic state of a system and all of its surroundings cannot be precisely restored to its initial state by infinitesimal changes in some property of the system without expenditure of energy. A system that undergoes an irreversible process may still be capable of returning to its initial state; however, the impossibility occurs in restoring the environment to its own initial conditions. An irreversible process increases the entropy of the universe. However, because entropy is a state function, the change in entropy of a system is the same whether the process is reversible or irreversible. The second law of thermodynamics can be used to determine whether a process is reversible or not.

All complex natural processes are irreversible.[1] The phenomenon of irreversibility results from the fact that if a thermodynamic system, which is any system of sufficient complexity, of interacting molecules is brought from one thermodynamic state to another, the configuration or arrangement of the atoms and molecules in the system will change in a way that is not easily predictable. A certain amount of "transformation energy" will be used as the molecules of the "working body" do work on each other when they change from one state to another. During this transformation, there will be a certain amount of heat energy loss or dissipation due to intermolecular friction and collisions; energy that will not be recoverable if the process is reversed.

Many biological processes that were once thought to be reversible have been found to actually be a pairing of two irreversible processes. Whereas a single enzyme was once believed to catalyze both the forward and reverse chemical changes, research has found that two separate enzymes of similar structure are typically needed to perform what results in a pair of thermodynamically irreversible processes."

Ismael Hamad
by Ismael Hamad , Trainer , ANTONOIL DMCC , Lukoil project, WQ2

"""""""""""""""""""""a - A loss of heat. 

Wolf Klaas Kinsbergen
by Wolf Klaas Kinsbergen , Managing Director, Designer , ingenieursbureau KB International NV

If it is irreversible, the process is unstoppable, so will not cost you heat/energy?

Alex Al Yazouri
by Alex Al Yazouri , General Manager , Al Mushref Cooperative Society

 A loss of heat.

It's a physical reaction not a chemical reaction.

Deleted user
by Deleted user

Choice -A

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