Chapter 9 pt2

Question 1

bomb calorimeter

Answer 1

measures heat of combustion reactions. this is done at constant volume…but, we re measuring the surroundings and applying it to the system

Question 2

coffee cup calorimeter

Answer 2

measures heat of combustion reactions through a constant pressure

Question 3

characteristics of a bomb calorimeter

Answer 3

• combustion reaction
• produces a gas (CO2), so work is involved
• gases can do work (expand or contract)

Question 4

characteristics of a coffee cup calorimeter

Answer 4

• solution reactions

- since everything is in a solution, there are no gases, so no work is being done

Question 5

bid difference between the coffee cup and bomb calorimeter

Answer 5

bomb leads you to a general deltaE, while the coffee-cup leads you to a specific deltaE

Question 6

hess’s law

Answer 6

if a reaction can be represented as the sum of two or more reactions, its deltaHreaction then is the sum of all the deltaHreaction in the process

Question 7

born haber cycle

Answer 7

represents how ionic molecules are made from base elements