Page 1 of 1

Thermodynamics 1st 2nd 3rd Law

Posted: Mon Jan 29, 2018 7:14 pm
by Grace Han 2K
Can someone explain what the 1st, 2nd, and 3rd law of thermodynamics mean (how they differ)?

Re: Thermodynamics 1st 2nd 3rd Law

Posted: Mon Jan 29, 2018 7:21 pm
by Justin Lau 1D
The first law just says that the internal energy of an isolated system doesn't change i.e. energy is conserved. The second law states that the entropy increases in an isolated system for any spontaneous process. Finally, the third law says that as the temperature approaches 0 Kelvins, the entropy of a system also approaches a constant value.

Re: Thermodynamics 1st 2nd 3rd Law

Posted: Wed Jan 31, 2018 3:41 pm
by torieoishi1A
1ST: Law of Conservation of Energy-energy can't be created nor destroyed; it can only be transferred from one form to another. Equation: deltaU=q+w
2ND: Entropy of any isolated system always increases, going to maximum entropy.
3RD: Entropy of a system approaches a constant value as temperature approaches 0K.