Thermodynamics

Question 1

Quantities necessary for calorimetry

Answer 1

The change in temperature of the water, the power of the heater, and the total time the heater was operated

Question 2

A calorimeter must be thermally isolated so that:

Answer 2

All the heat released by the sample will be absorbed by the bomb and the water

Question 3

Closed system: q = qw + qb

Answer 3

q = (mbcb + mwcw) ΔT

Question 4

ΔpKaI0C is negative

Answer 4

This means temperature is increasing, and the pKa is decreasing
Since pKa gets smaller, that means Ka gets larger, which indicates more dissociation at higher temperatures, therefore the rxn requires heat, which means it is endothermic and has a positive change in enthalpy

Question 5

ΔG =

Answer 5

ΔH - TS

Question 6

Energy is removed from the body by all of the following types of heat transfer:

Answer 6

Conduction, convection, and radiation

Question 7

Ka x Kb = 10^-14 OR

Answer 7

pKa + pKb = 14