Thermochem Jeopardy Exo/Endo Unit Conversions Vocab Specific Heat & Calorimetry Miscellaneous Q $100 Q $200 Q $300 Q $400 Q $500 Q $100 Q $200 Q $300 Q $400 Q $500 Final Jeopardy

Is the reaction below endothermic or exothermic? NaOH (s) + H 2 O (l)  NaOH (aq) + heat

exothermic

Given the thermochemical equation below, is the reaction exo or endothermic? 4 NO(g) + 6 H 2 O(l)  4 NH 3 (g) + 5 O 2 (g) ΔH = kJ

$200 Answer from Exo/Endo endothermic

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

Is this energy diagram below depicting an exothermic or endothermic reaction?

$400 Answer from Exo/Endo endothermic

2 S (s) + 2 O 2 (g) ---> 2 SO 2 (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

257 kJ = __________ J

$100 Answer from Unit Conversions 257,000 J

2200 calories = ________ Calories

$200 Answer from Unit Conversions 2.2 Calories

134 J = ____________ cal

$300 Answer from Unit Conversions cal

62 kcal = _____________ J

$400 Answer from Unit Conversions 259,408 J

11.4 kJ = ___________ Cal

$500 Answer from Unit Conversions 2.72 Cal

The part of the universe on which you focus your attention

$100 Answer from Vocab system

The study of heat changes in chemical reactions

$200 Answer from Vocab thermochemistry

The ability to do work or supply heat; units may be in joules or calories

$300 Answer from Vocab Energy

Energy that is transferred from one object to another because of a difference in temperature between them

$400 Answer from Vocab heat

The amount of heat it takes to raise 1 gram of a substance 1C

$500 Answer from Vocab Specific Heat

How much heat is generated when 15 g of Aluminum (specific heat of 0.90 J/gC) cools down from 67C to 29C?

$100 Answer from Specific Heat & Calorimetry J

How much energy, in calories, is required when 74 g of water (specific heat of J/gC or 1.0 cal/gC) is heated 38C?

$200 Answer from Specific Heat & Calorimetry 2812 calories

It takes 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

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

A g sample of TNT (C 7 H 5 N 2 O 6 ) is burned in a calorimeter containing 610 grams of water. The temperature of the water rises from 20.0ºC to 177ºC. (specific heat of J/gC or 1.0 cal/gC) What is the heat (in J) LOST by the TNT?

$500 Answer from Specific Heat & Calorimetry - 400,701.7 J

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 C 2 H 2 (g) + 5 O 2 (g)  4 CO 2 (g) + 2 H 2 O (l) ΔH = 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 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 NO 2 (g). N 2 (g) + 2 O 2 (g)  2 NO 2 (g) ΔH = kJ

$500 Answer from Misc. 845 J

The term enthalpy means the exact same thing as heat when one condition remains constant. What is that condition?

Constant Pressure