Answer to Question #199852 in General Chemistry for Web

Question

1. The heat of combustion of 2-propanol at 298.15 K, determined in a bomb calorimeter, is -

33.41 kJ/g. For the complete combustion of one mole of 2-propanol, determine (a) ΔE, and (b)

ΔH.

2. A 1.397 g sample of thymol, C 10 H 14 O (s),is burned in a bomb calorimeter assembly. The temperature increase is 11.23°C, and the heat

capacity of the bomb calorimeter is 4.68 kJ/°C. What is the heat of combustion of thymol,

expressed in kJ/mol C 10 H 14 O?

3. The heat of solution of NaOH is -44.5 kJ/mol NaOH. To what maximum temperature may a sample

of water, originally at 21°C, be raised in the preparation of 500 mL of 7.0 M NaOH? Assume the

solution has a density of 1.08 g/mL and specific heat of 4.00 J/g°C.

4. Brass has a density of 8.40 g/cm 3 and a specific heat of 0.385 J/g°C. A 15.2 cm 3 piece of

brass at an initial temperature of 163°C is dropped into an insulated container with 150.0 g

water initially at 22.4°C. Find the final temperature of the brass-water mixture

Answer 1

1.397 g sample of thymol, C 10 H 14 O (s),is burned in a bomb calorimeter assembly. The temperature increase is 11.23°C, and the heat

capacity of the bomb calorimeter is 4.68 kJ/°C. What is the heat of combustion of thymol,

expressed in kJ/mol C 10 H 14 O?

The heat of solution of NaOH is -44.5 kJ/mol NaOH. To what maximum temperature may a sample

of water, originally at 21°C, be raised in the preparation of 500 mL of 7.0 M NaOH? Assume the

solution has a density of 1.08 g/mL and specific heat of 4.00 J/g°C.