week 2 thermo

Question 1

what is heat capacity ?

Answer 1

heat energy required to raise the temperature of an object by 1 degree or 1K

Question 2

what is the second law off thermodynamics (clausius and kelvin)

Answer 2

clausius - no process is possible who’s sole result is the transfer of heat from a body of cold temp to a body of higher temp meaning heat can not go from hot to cold

kelvin - no process is possible in which the sole result is the absorption of heat from a reservoir and its complete conversion of work meaning all the heat will and can not be turned into work some will sink cold

entropy reversible heat reaction.

Question 3

why does the entropy of an isolated system always increase?

Answer 3

because there is many ways to maintain the structure of a high entropy structure compared to a few ways of doing this for a low entropy system therefore it is mathematically overwhelmingly more likely that low entropy highly ordered structures will transfer into high entropy disordered structures

Question 4

what makes a chemical reaction feasible (spontaneous)

Answer 4

the entropy of the universe must increase

the Gibbs energy of the system must decrease