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Thermochem Jeopardy
Exo/EndoUnit
Conversions VocabSpecific Heat& Calorimetry Miscellaneous
Q $100
Q $200
Q $300
Q $400
Q $500
Q $100 Q $100Q $100 Q $100
Q $200 Q $200 Q $200 Q $200
Q $300 Q $300 Q $300 Q $300
Q $400 Q $400 Q $400 Q $400
Q $500 Q $500 Q $500 Q $500
Final Jeopardy
Is the reaction below endothermic or exothermic?
NaOH (s) + H2O (l) NaOH (aq) + heat
$100 Answer from Exo vs. Endo
$100 Answer from Exo/Endo
exothermic
$200 Question from Exo/Endo
Given the thermochemical equation below, is the reaction exo or
endothermic?
4 NO(g) + 6 H2O(l) 4 NH3(g) + 5 O2(g) ΔH = +1170 kJ
$200 Answer from Exo/Endo
endothermic
$300 Question from Exo/Endo
If a system is getting cooler and the surroundings are getting
warmer, is this an exothermic or endothermic reaction?
$300 Answer from Exo/Endo
exothermic
$400 Question from Exo/endo
Is this energy diagram below depicting an exothermic or endothermic reaction?
$400 Answer from Exo/Endo
endothermic
$500 Question from Exo/Endo
2 S(s) + 2 O2 (g) ---> 2 SO2 (g) ΔH = -592 kJ
Based on the reaction above, would the reactants or products have a higher energy?
(Hint: think about the enthalpy diagram)
$500 Answer from Exo/Endo
Reactants have higher energy in an
exothermic reaction
$100 Question from Unit Conversions
257 kJ = __________ J
$100 Answer from Unit Conversions
257,000 J
$200 Question from Unit Conversions
2200 calories = ________ Calories
$200 Answer from Unit Conversions
2.2 Calories
$300 Question from Unit Conversions
134 J = ____________ cal
$300 Answer from Unit Conversions
32.03 cal
$400 Question from Unit Conversions
62 kcal = _____________ J
$400 Answer from Unit Conversions
259,408 J
$500 Question from Unit Conversions
11.4 kJ = ___________ Cal
$500 Answer from Unit Conversions
2.72 Cal
$100 Question from Vocab
The part of the universe on which you focus your attention
$100 Answer from Vocab
system
$200 Question from Vocab
The study of heat changes in chemical reactions
$200 Answer from Vocab
thermochemistry
$300 Question from Vocab
The ability to do work or supply heat; units may be in
joules or calories
$300 Answer from Vocab
Energy
$400 Question from Vocab
Energy that is transferred from one object to another because of a difference in temperature
between them
$400 Answer from Vocab
heat
$500 Question from Vocab
The amount of heat it takes to raise 1 gram of a substance 1ᵒC
$500 Answer from Vocab
Specific Heat
$100 Question from Specific Heat & Calorimetry
How much heat is generated when 15 g of Aluminum (specific
heat of 0.90 J/gᵒC) cools down from 67ᵒC to 29ᵒC?
$100 Answer from Specific Heat & Calorimetry
- 513 J
$200 Question from Specific Heat & Calorimetry
How much energy, in calories, is required when 74 g of water
(specific heat of 4.184 J/gᵒC or 1.0 cal/gᵒC) is heated 38ᵒC?
$200 Answer from Specific Heat & Calorimetry
2812 calories
$300 Question from Specific Heat & Calorimetry
It takes 487.5 J to heat 25 grams of copper from 25 °C
to 75 °C. What is the specific heat in Joules/g·°C?
$300 Answer from Specific Heat & Calorimetry
0.39 J/g·°C
$400 Question from Specific Heat & Calorimetry
In calorimetry, what is the job of the calorimeter and how
does it accomplish this?
$400 Answer from Specific Heat & Calorimetry
The calorimeter must MAINTAIN all of the heat transferred between the system and the surroundings. It
must be INSULATED to ensure that not heat is lost to the outside world
$500 Question from Specific Heat & Calorimetry
A 0.500 g sample of TNT (C7H5N2O6) is burned in a calorimeter containing 610 grams of water. The temperature of the
water rises from 20.0ºC to 177ºC. (specific heat of 4.184 J/gᵒC or 1.0 cal/gᵒC)What is the heat (in J) LOST by the TNT?
$500 Answer from Specific Heat & Calorimetry
- 400,701.7 J
$100 Question from Misc.
Which region of the curve represents freezing?
$100 Answer from Misc.
Region B
$200 Question from Misc.
Heat always flows from the _________ object to the _________ object.
$200 Answer from Misc.
Warmer, cooler
$300 Question from Misc.
2 C2H2 (g) + 5 O2 (g) 4 CO2 (g) + 2 H2O(l) ΔH = -2598.8 kJ
Given the reaction above, how much heat (in kJ) would be released when 3.2 moles of oxygen gas are used?
$300 Answer from Misc.
-1663.2 kJ
$400 Question from Misc.
Which letter, will correspond on the y-axis to the boiling point of the substance in the heating curve below?
$400 Answer from Misc.
Letter D
$500 Question from Misc.
Based upon the thermochemical equation given, calculate the heat
(in Joules) associated with the production of 1.15 g of NO2 (g).
N2 (g) + 2 O2 (g) 2 NO2 (g) ΔH = +67.6 kJ
$500 Answer from Misc.
845 J
Final JeopardyThe term enthalpy means the exact
same thing as heat when one condition remains constant.
What is that condition?
Final Jeopardy Answer
Constant Pressure