Energy Chapter 10 JEOPARDY CalorimetryVocabEnergy Specific Heat Capacity Hess’s Law 100 200 300 400 500.

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Presentation transcript:

Energy Chapter 10 JEOPARDY

CalorimetryVocabEnergy Specific Heat Capacity Hess’s Law

Calorimetry 100 An insulated device used to determine the heat associated with a chemical reaction A: What is a Calorimeter? S2C06 Jeopardy Review

Calorimetry 2 00 A: What is an endothermic process? The process described here S2C06 Jeopardy Review Reactants + energy  Products

Calorimetry 300 A: What is a calorie (or 4.184J) ? The quantity of energy required to heat one gram of water by one Celsius degree S2C06 Jeopardy Review

Calorimetry 400 A: What are 251 J ? The joule equivalent to 60.1 calories S2C06 Jeopardy Review

Calorimetry 500 A: What is 49 o C ? (4.18)(125)(68-x) = (2.22)(138)(x-17) x = 49ºC The thermal equilibrium temperature if 125 g of water at 68 o C is mixed with 138 g of gasoline at 17 o C ? c water = 4.18J/gC; c gas = 2.22J/gC S2C06 Jeopardy Review

Vocabulary 100 A: What is the First Law of Thermodynamics? S2C06 Jeopardy Review A law stating that the energy of the universe is constant

Vocabulary 200 A: What is heat? Energy transferred between two objects due to a temperature difference between them S2C06 Jeopardy Review

Vocabulary 300 A: What is potential energy? Energy due to position or composition S2C06 Jeopardy Review

Vocabulary 400 A: What is internal energy ? The sum of the kinetic and potential energies of all components of an object (ΔE = q + w) S2C06 Jeopardy Review

Vocabulary 500 A: What is a state function? A property of the system that changes independent of pathway S2C06 Jeopardy Review

Energy 100 A: What is petroleum? S2C06 Jeopardy Review A thick, dark liquid composed mostly of hydro-carbon compounds

Energy 200 A: What is the Greenhouse Effect? A warming effect exerted by certain molecules in the earth’s atmosphere (particularly carbon dioxide and water) S2C06 Jeopardy Review

Energy 300 A: What is coal? Formed from the remains of plants that were buried and subjected to high pressure and heat over long periods of time S2C06 Jeopardy Review

Energy 400 A: What is 13.4 calories? Calories of energy that correspond to 56.2 joules S2C06 Jeopardy Review

Energy 500 A: What is wind energy ? A form of renewable energy that has been used for several millennia and is currently being harvested across farmlands S2C06 Jeopardy Review

Specific Heat Capacity 100 A: What is specific heat capacity? S2C06 Jeopardy Review The amount of heat required to raise the temperature of one gram of substance by one degree Celsius.

Specific Heat Capacity 200 A: What is 526 J? S2C06 Jeopardy Review The amount of heat energy (in joules) needed to raise the temperature of 7.40 g of water from 29.0°C to 46.0°C

Specific Heat Capacity 300 A: What are J/g o C ? The units for specific heat capacity? S2C06 Jeopardy Review

Specific Heat Capacity 400 S2C06 Jeopardy Review A: What are 1.77 X 10 5 J ? The joules of energy required to heat 454g of water from 5.40°C to 98.6°C ? 4.18 J x 454 g x 93.2°C = 1.77 X 10 5 J g °C

Specific Heat Capacity 500 S2C06 Jeopardy Review A: What are 314,000 J (or 314 kJ) ? The amount of energy as heat that is required to raise the temperature of 1.00 L of water from 25.0 C to boiling 4.18 J x 1000 g x 75.0°C = 313,500 J g °C

Hess’s Law 100 A: What is enthalpy ( ΔH) ? The change in heat that flows during a reaction at constant pressure S2C06 Jeopardy Review

Hess’s Law 200 A: What is +68 kJ ? S2C06 Jeopardy Review Calculate  H for the following reaction: N 2 + 2O 2  2NO 2 Given: Reaction  H o N 2 + O 2  2NO180 kJ 2NO + O 2  2NO kJ

Hess’s Law 300 A: What is ? S2C06 Jeopardy Review Calculate  H for the following reaction: C 2 H 4 + 6F 2  2CF 4 + 4HF Given: Reaction  H o H 2 + F 2  2HF-537 kJ 2C + 2H 2  C 2 H 4 52 kJ CF 4  C + 2 F kJ

Hess’s Law 400 A: What is – 792 kJ ? S2C06 Jeopardy Review Calculate  H for the following reaction: 2S + 3O 2  2SO 3 Given: Reaction  H o S + O 2  SO kJ 2SO 3  2 SO 2 +O kJ

Hess’s Law 500 S2C06 Jeopardy Review A: What is ? Calculate  H for the combustion of methane, CH 4 : CH 4 + 2O 2  CO 2 + 2H 2 O Given: Reaction  H o C + 2H 2  CH kJ C + O 2  CO kJ H 2 + ½ O 2  H 2 O kJ