Mostly students get confused about answer's signs so lets have a look at it:There are two kinda rules about signs 1) Addition2) Multiplication1) Addition: + + + = + a+b = - + - = -a+(-b)= -cIf all the...
Ans: Second law of thermodynamics. First law thermodynamics doesn't give the direction of the process. This limitation solves the introduction in the concept of entropy in the second law of thermodynamics....