Lab T

Question 1

Is heat capacity extensive or intensive

Answer 1

extensive

Question 1

Extensive

Answer 1

property which depends on amount of sample - weight, specific heat capacity

Question 2

is specific heat capacity extensive or intensive

Answer 2

intensive

Question 3

intensive

Answer 3

property which is no dependent on amount of sample - specific heat capacity, temp.

Question 4

specific heat capacity of water

Answer 4

4.184

Question 5

in an exothermic reaction, is the enthalpy positive or negative

Answer 5

negative

Question 6

in an endothermic reaction, is the enthalpy positive or negative

Answer 6

positive

Question 7

(-) ΔG

Answer 7

spontaneous reaction

Question 8

+ ΔG

Answer 8

non-spontaneous reaction

Question 9

In Lab T, Steps to solve the dissociation of HSO4 (3)

Answer 9

1. find the ΔHneut of H+
2. find the ΔHneut of HSO4
3. Subtract the ΔH from 1 and 2. (subtracting the two neut. eqn. will equal the overall dissociation rxn.) - (Hess’ Law)

Question 10

In Lab T, formula for Ksp

Answer 10

1/2 * [OH-]^3

Question 11

Draw an exothermic calorimeter graph

Question 12

Draw an endothermic calorimeter graph

Question 13

What is Te

Question 14

Experiment T Dissociation of HSO4-: Lab Timeline (4)

Answer 14

1. H+ measured and poured into a calorimeter. temp recorded as initial temp.
2. NaOH added to calorimeter
3. Record time and temperature of solution in calorimeter ever 30 sec for 3 min
4. make new calorimeter with measured amount of HSO4-, initial temp. is recorded. continue recording temp. ever 30 sec

Question 15

Experiment T, Part 2: Timeline

Answer 15

1. saturated son of Ca(OH)2 is filtered and temp. recorded
2. titrate Ca(OH)2 with H+. Indicator is phenolphthalein and will turn clear at equilibrium
3. repeat titration
4. boil a new sample of saturated Ca(OH)2. Repeat steps 1-3