A copper calorimeter was used to determine the enthalpy of combustion of butan-1-ol. The experimental value obtained was −2100±200 kJ mol−1 , and the data booklet value is −2676 kJ mol−1 .
Which of the following accounts for the difference between the two values?
- I. random measurement errors
- II. incomplete combustion
- III. heat loss to the surroundings
a. I and II only
b. I and III only
c. II and III only
d. I, II and III