# Jeopardy Thermo A

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```					 Round 2!

Double Jeopardy
Calorim-            Changes            Thermo
Energy              Vocab
etry               in Heat            Fun

100       100       100      100      100

200       200       200      200      200

300       300       300      300      300

400       400       400      400      400

500       500       500      500      500
FJ
Calorimetry for 100

Question: What is the system in
this example?

NaOH
H 2O

Calorimetry for 100

NaOH
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Calorimetry for 200

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

Calorimetry for 200

surroundings

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Calorimetry for 300
Question: What is wrong with this
calorimeter?

Calorimetry for 300

heat to the environment!

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Calorimetry for 400
Question: What
is/are the
surrounding(s) in
this example?

Calorimetry for 400

(and everything
else except the
metal!)

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Calorimetry for 500
Question: What law explains the basis
for calorimetry?

Calorimetry for 500

of Energy

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Energy for 100

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

Energy for 100

energy

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Energy for 200

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

Energy for 200

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 35.0  oC. What is

the specific heat of the
metal?
Energy for 300

q        250 .J
c                       0.238 J / g C
o

mT 30 .0 g  35 .0 C
o

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Energy for 400

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

Energy for 400

Kinetic energy =
energy of motion
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Energy for 500

Question: Convert
this energy to
joules.
440.
Calories

Energy for 500

440Cal 1000cal 4.184J
               1.84 x10 J
6

1     1Cal    1cal

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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.

Changes in Heat for 100

Heat is
released

Ice Lab!

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Changes in Heat for 200

Question: What is the term
for energy transferred
between objects because
of a difference in
temperature?
Changes in Heat for 200

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Changes in Heat for 300

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

Changes in Heat for 300

1molH 2O     40 .7 kJ
50 .0 gH 2O                         113 kJ
18 .02 gH 2O 1molH 2O

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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.
Changes in Heat for 400
q gained   qlost
20.0(T f  250)  35.0(T f  310)
20.0T f  5000  35.0T f  10850
55.0T f  15850
T f  288K
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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?

Changes in Heat for 500

 qlost  q gained
q  mC T  150 .g  4.184 J / g C  3.80 C  2380 J
o        o

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Vocab for 100

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

Vocab for 100

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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?

Vocab for 200

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Vocab for 300

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

Vocab for 300

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Vocab for 400
Question: What does ΔHf stand
for?

Vocab for 400
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?

Vocab for 500
ΔHvap

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Thermo Fun for 100
Question: What are standard
conditions for a thermochemical
equation?

Thermo Fun for 100
pressure (1 atm)

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Thermo Fun for 200
Question: Write the complete
thermochemical equation for the
formation of carbon monoxide gas.

Thermo Fun for 200

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 + CO2
(g)         (g)   ΔH=?

H2CO(g) + O2(g)  H2CO3(g)          ΔH =-252.0 kJ
H2O(g) + CO2(g)  H2CO(g) + O2(g)   ΔH =112.5 kJ
Thermo Fun for 300
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 + CO2
(g)       (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

Thermo Fun for 400

1molNH 4 NO3       25 .7 kJ
15 .0 gNH 4 NO3                                4.82 kJ
80 .06 gNH 4 NO3 1molNH 4 NO3

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Thermo Fun for 500
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

q  mC T
q       153 .9 J       55 .85 gFe
C                                   25 .1J / mol o C
mT 25 .75 g  13 .3 C 1molFe
o

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Final Category

Heat in Changes of State
Final Question
Question: How
many kilojoules
are required to
heat 10.0 grams of
water from 10.0 oC  Cice = 2.03 J/goC
to 110. oC?    Csteam = 2.02 J/goC

B

end
A
start

A : q  mC T  10 .0 g  4.184 J / g o C  90 o C  3765 .6 J  3.7656 kJ
1molH 2O     40 .7 kJ       +
B : q  10 .0 g                           22 .59 kJ
18 .02 gH 2O 1molH 2O
+
C : q  mC T  10 .0 g  2.02 J / g C  10 C  202 J  0.202 kJ
o      o

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 views: 10 posted: 7/27/2012 language: pages: 57