Experiment G: Calorimetry

Question 0

_____ and _____ are the means by which energy might be transferred to or from a body

Answer 0

Heat and work

Question 1

The heat capacity (C) is:

Answer 1

The heat capacity of and object or substance is the amount of heat needed to change it’s temperature per degree

Question 2

The equation for heat capacity is:

Answer 2

C= q/(Tf-Ti)

Question 3

Formula for specific heat capacity used to caulk at heat capacity

Answer 3

C= c(mass of substance)

Question 4

The heat capacity formula calculate with molar heat capacity:

Answer 4

C= Cm(moles of substance)

Question 5

When the calorimeter is at a constant pressure the energy transferred (which ether enters or leaves the system) is _____ the enthalpy change (delta H)

Answer 5

Equals

Question 6

If the delta H is positive then:

Answer 6

The reaction is endothermic an enthalpy would be transferred to the system from the surroundings

Question 7

Formula for heat capacity related to enthalpy change:

Answer 7

C= (delta H)/ (Tf-Ti)

Question 8

Since the calorimeter is an excellent thermal insulator the total enthalpy of the calorimeter plus contents is ______ during your experiment

Answer 8

Unchanged

(Delta H) total= 0

Question 9

What is the equation used to calculate the heat capacity of the block?

Answer 9

Cblock = -{Cwater x (Tf-Ti)water}/(Tf-Ti)block

Question 10

What is the specific heat capacity of water?

Answer 10

4.184 J/(g x degrees Celsius)

Question 11

What is the equation for the enthalpy of fusion?

Answer 11

Delta H fusion+ (C ice-water x (Tf-Ti ice-water))= -(C water in calorimeter before ice was added x (Tf-Ti water))

Question 12

The enthalpy changes of chemical reactions are measured in a device called ___________.

Answer 12

A calorimeter