Calorimetry

Question 1

what is the equation for calorimetry?

Answer 1

Q=MCAT

Question 2

How do you calculate the enthalpy change of combustion?

Answer 2

1. work out heat gain/lost - Q=MCT
2. work out the moles
   3 q/n to calculate thr standard enthalpy change of combustion

Question 3

why do you use a calorimeter for combustion?

Answer 3

to find the enthalpy of combustion of the flammable liquid

Question 4

how do you work out the enthalpy change of combustion using the calorimeter?

Answer 4

as the fuel burns, it heats the water, you have to calculate the heat absorbed by the water (the mass and SHC is known) and temp change

Question 5

ideally, what happens in calorimeter?

Answer 5

all heat is given out by the burning fuel would be absorbed by the water=accurate enthalpy of combustion =but you always lose heat to surroundings

Question 6

when you burn a fuel, what happens in terms of the combustion reactions?

Answer 6

some of the combustion reactions may be incomplete.

Question 7

what are flammable liquids like?

Answer 7

they are volatile - lose some to evaporation