Round 2!

Double Jeopardy

Calorim-Calorim-etryetry EnergyEnergy Changes Changes

in Heatin Heat VocabVocab Thermo Thermo FunFun

100 100 100 100 100

200 200 200 200 200

300 300 300 300 300

400 400 400 400 400

500 500 500 500 500FJ

Calorimetry for 100

Question: What is the system in this example?

Check Your Answer

H2O

NaO

H

Calorimetry for 100

Answer: NaOH

Back to Game Board

NaO

H

Calorimetry for 200

Question: Heat lost by the system is equal to what?

Check Your Answer

Calorimetry for 200

Answer: Heat gained by the surroundings

Back to Game Board

Calorimetry for 300

Question: What is wrong with this calorimeter?

Check Your Answer

Calorimetry for 300

Answer: no cover – losing heat to the environment!

Back to Game Board

Calorimetry for 400

Question: What is/are the surrounding(s) in this example?

Check Your Answer

Calorimetry for 400

Answer: Water (and everything else except the metal!)

Back to Game Board

Calorimetry for 500

Question: What law explains the basis for calorimetry?

Check Your Answer

Calorimetry for 500

Answer: Law of Conservation of Energy

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Energy for 100

Question: What type of energy is stored in the bonds of a substance?

Check Your Answer

Energy for 100

Answer: Chemical potential energy

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Energy for 200

Question: Which has the most thermal energy? (all contain H2O)

Check Your Answer

Energy for 200

Answer: B, most

mass and highest

temperature

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Energy for 300

Question: A 30.0 g piece of metal gives off 250. J as it cools down 35.0oC. What is the specific heat of the metal?

Check Your Answer

Energy for 300

Answer: 0.238 J/goC

Back to Game Board

CgJCg

J

Tm

qc o

o/238.0

0.350.30

.250

Energy for 400

Question: What is the term for the measure of the average kinetic energy of a substance?

Check Your Answer

Energy for 400

Answer: Temperature

Kinetic energy =

energy of motion

Back to Game Board

Energy for 500

Question: Convert this energy to joules.

Check Your Answer

440. Calorie

s

Energy for 500

Answer: 1.84 x 106 J

Back to Game Board

Jxcal

J

Cal

calCal 61084.11

184.4

1

1000

1

440

Changes in Heat for 100

Question: Is this process endothermic or exothermic:

Water vapor in the air condenses on the outside of a glass of iced tea.

Check Your Answer

Changes in Heat for 100

Answer: Exothermic

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Heat is released

Ice Lab!

Changes in Heat for 200

Question: What is the term for energy transferred between objects because of a difference in temperature?

Check Your Answer

Changes in Heat for 200

Answer: Heat

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Changes in Heat for 300

Check Your Answer

Question: Calculate the amount of heat required in kilojoules to boil 50.0g of water at its boiling point.

Changes in Heat for 300

Answer: 113 kJ

Back to Game Board

kJOmolH

kJ

OgH

OmolHOgH 113

1

7.40

02.18

10.50

22

22

Changes in Heat for 400

Question: A 20.0g sample of water at 250. K is mixed with 35.0g of water at 310. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.

Check Your Answer

Changes in Heat for 400

Answer: 288K

KT

T

TT

TT

f

f

ff

ff

288

158500.55

108500.3550000.20

)310(0.35)250(0.20

Back to Game Board

lostgained qq

Changes in Heat for 500

Question: How much heat does a metal lose when it is heated and then submerged in 150. g of cool water, and the temperature of the water increases by 3.80oC assuming no heat loss to the surroundings?

Check Your Answer

Changes in Heat for 500

Answer: 2380 J

gainedlost qq

Back to Game Board

JCCgJgTmCq oo 238080.3/184.4.150

Vocab for 100

Question: What is the name for this piece of equipment?

Check Your Answer

Vocab for 100

Answer: Calorimeter

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Vocab for 200

Question: What is the term for the amount of heat need to raise the temperature of an object by 1oC?

Check Your Answer

Vocab for 200

Answer: heat capacity

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Vocab for 300

Question: What is the term for the heat content of a system at constant pressure?

Check Your Answer

Vocab for 300

Answer: Enthalpy (H)

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Vocab for 400

Question: What does ΔHf stand for?

Check Your Answer

Vocab for 400

Answer: Standard heat of formation

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Vocab for 500

Question: What is the term that means the energy required to boil one mole of a substance at its boiling point?

Check Your Answer

Vocab for 500

Answer: Molar heat of vaporization, ΔHvap

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Thermo Fun for 100

Question: What are standard conditions for a thermochemical equation?

Check Your Answer

Thermo Fun for 100

Answer: 25oC and standard pressure (1 atm)

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Thermo Fun for 200

Question: Write the complete thermochemical equation for the formation of carbon monoxide gas.

Check Your Answer

Thermo Fun for 200

Answer:

C(s) + ½ O2(g) CO(g) ΔH = -110.5 kJ/mol

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Thermo Fun for 300

Question: Find the ΔH for this reaction using Hess’s Law:

H2CO3(g) H2O(g) + CO2(g) ΔH=?

H2CO(g) + O2(g) H2CO3(g) ΔH =-252.0 kJ

H2O(g) + CO2(g) H2CO(g) + O2(g) ΔH =112.5 kJ

Check Your Answer

Thermo Fun for 300

Answer: H2CO3(g) H2CO(g) + O2(g) ΔH =+252.0 kJ

H2CO(g) + O2(g) H2O(g) + CO2(g) ΔH =-112.5 kJ

H2CO3(g) H2O(g) + CO2(g) ΔH=139.5kJ

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Thermo Fun for 400

Question: How much heat is absorbed when 15.0 g of NH4NO3 are dissolved in water?

NH4NO3(s) → NH4+(aq) + NO3

-(aq)

Hsoln = 25.7 kJ/mol

Check Your Answer

Thermo Fun for 400

Answer: 4.82 kJ

Back to Game Board

kJNOmolNH

kJ

NOgNH

NOmolNHNOgNH 82.4

1

7.25

06.80

10.15

3434

3434

Thermo Fun for 500

Check Your Answer

Question: It takes 153.9 J to raise the temperature of 25.75 g of iron from 25.0oC to 38.3oC. Calculate the molar heat capacity.

Thermo Fun for 500

Answer: 25.1 J/moloC

Back to Game Board

CmolJmolFe

gFe

Cg

J

Tm

qC

TmCq

oo

/1.251

85.55

3.1375.25

9.153

Final Category

Heat in Changes of State

Final Question

Question: How many kilojoules are required to

heat 10.0 grams of water from 10.0oC

to 110. oC?

Answer

Cice = 2.03 J/goC

Csteam = 2.02 J/goC

Final Answer

Answer: 26.6 kJ

Back to Game Board

start

endA

CB

kJJCCgJgTmCq:C

kJOmolH

kJ

OgH

OmolHgq:B

kJJCCgJgTmCq:A

oo

oo

202.020210/02.20.10

59.221

7.40

02.18

10.10

7656.36.376590/184.40.10

22

2

+

+