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