Chapter 6.3 Calorimetry: Measuring the Heat of a Chemical or Physical Change

Question 1

heat capacity

Answer 1

the quantity of heat required to change its temperature by 1K:
Heat Capactiy = q/ΔT (units of J/K)

Question 2

specific heat capacity (c)

Answer 2

quantity of heat required to change the temperature of 1 gram of the object by 1K:
c = q/ mass · ΔT (units of J/g·K)

Question 3

equation to calculate the heat absorbed (or released)

Answer 3

q = c · mass · ΔT

• when ΔT is positive, q > 0 the object absorbs heat
• when ΔT is negative, q

Question 4

molar heat capacity (C)

Answer 4

the quantity of heat required the change the temperature of 1 mole of a substance by 1K (reserved for substances):
C = q/ mol · ΔT (units of J/mol·K)

Question 5

calorimeter

Answer 5

used to measure the heat released (or absorbed) by a physical or chemical process

Question 6

equation for constant pressure calorimetry

Answer 6

• qsolid = qh2o

* -[c(solid) · mass(solid) · ΔT(solid)] = [c(H2O) · mass(H2O) · ΔT(H2O)]

Question 7

bomb calorimeter

Answer 7

used to measure the heat of combustion reactions; can determine the heat capacity of the entire container