round 2! double jeopardy calorim- etry energy changes in heat vocab thermo fun 100 200 300 400 500...
Post on 27-Mar-2015
214 Views
Preview:
TRANSCRIPT
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
Back to Game Board
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
Back to Game Board
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
Back to Game Board
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
Back to Game Board
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
Back to Game Board
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
Back to Game Board
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
Back to Game Board
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)
Back to Game Board
Vocab for 400
Question: What does ΔHf stand for?
Check Your Answer
Vocab for 400
Answer: Standard heat of formation
Back to Game Board
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
Back to Game Board
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)
Back to Game Board
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
Back to Game Board
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
Back to Game Board
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
+
+
top related