week 5

Question 1

what is the first law of thermodynamics

Answer 1

energy can be transformed from one form to an other, but quantity remains the same

Question 2

what are the 3 limitations of the first law of thermodynamics

Answer 2

the law does not indicate the direction of heat travel

can’t explain why heat cannot be transferred from a
lower temperature body to a higher temperature body

can’t explain why all of the heat energy cannot be converted into work (loss of heat energy not explained)

Question 3

what is the second law of thermodynamics

Answer 3

“energy has quantity as well as quality”

Question 4

what does the second law of thermodynamics show that the first law doesn’t

Answer 4

shows that the
EFFICIENCY of Engines is always
less than 100%, that means it is
impossible to convert the whole
HEAT into WORK.
(1st Law does not indicate the extent to which
how much HEAT could be converted into WORK),

Question 5

what is a entropy

Answer 5

Entropy can be viewed as measures of disorder or

disorganisation in a system.