LAB J

Question 1

what is an isolated system? how is it different from a closed

Answer 1

isolated- cant enter or leave
closed system- only energy can leave

Question 2

if a thermos containing hot coffee is an isolated system, will the coffee ever cool down?

Answer 2

no because nothing can leave or enter

Question 3

q hot, q cold, c cal overall equation

Answer 3

qhot + qcold + qcal = 0

cold and hot= heat capicty formula
cal= c cal (^T)

Question 4

how did we find the mass

Answer 4

found q cold
-find q cal
-find q hot
-find mass by taking heat pack over q hot to get mols then find mass

Question 5

did you account for heat capacity of the calorimeter in your exp? how would the results be affected if heat cap was not taken into account

Answer 5

-no bc we dont know what the heat capacity of the thermus is?

-it would be affected as wed have to know amount of energy that leaves the system