sign of entropy

[Jack Papciak 2F]

How do I know whether the entropy has a "+" or a "-"?

[Grace Boyd 2F]

As Dr. Lavelle explained today in lecture, the sign of entropy depends on the direction of heat flow. If the system loses heat, the entropy will have a negative sign in front of it. If the surroundings gain heat, the entropy will have a positive sign. I hope this helps!

[Alyssa Pelak 1J]

Additionally, entropy is positive when the reaction spontaneous. It means that the system has more possible states. Entropy is negative when the system has less possible states.

[Lauren Seidl 1D]

Also, if delta entropy equals zero then the reaction is at equilibrium.

[Leanne Wong 1H]

You determine the sign of entropy by the direction of heat flow.

[RohanGupta1G]

Direction of heat flow determines the sign as well as whether or not the reaction is spontaneous.

[Jingyi Li 2C]

The sign of entropy indicates the direction of heat flow.

[Amanda Wu 2C]

The sign of entropy is indicative of the heat flow in or out of the system. A system in which heat flows out to the surroundings will have a negative entropy whereas a system in which heat flows in from the surroundings will have a positive entropy.

[Josh Moy 1H]

sign of entropy depends on flow of heat

[melissa carey 1f]

Additionally, during a process of expansion entropy increases as there are more possible states.

[JamesAntonios 1E]

How do I know whether the entropy has a "+" or a "-"?

It depends on the the ratio of final to initial temperature, volume, and/or pressure. You can logically think about by analyzing whether the number of microstates is increasing or decreasing, which can give an indication to what the sign should be.

[Luke Bricca 1H]

Additionally, in connection with Gibbs free energy, if the sign of the delta G is negative, the reaction is spontaneous and favorable.