final topics Flashcards
(7 cards)
1
Q
for solids and liquids, what is dV
A
dV is 0, the volume does not change much
2
Q
what is the enthalpy of formation
A
it is the change to form a compound from its elements in their standard states
3
Q
when is the ∆H°f of an element =0?
A
when it is in its standard state
4
Q
what is the equation for efficiency
A
work output/heat input
5
Q
what law is the carnot cycle governed by
A
the 2nd law of thermodynamics where in a cyclic process, the heat input into the cycle cannot be 100% made into work
efficiency always less than 1
6
Q
what is the change in entropy for the carnot cycle
A
it is 0
7
Q
for a chemical reaction, what does the entropy depend on
A
the change in moles of gas
more = ∆S>0
