13886449
Descripción
Test por patricia alvarez, actualizado hace más de 1 año
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Creado por patricia alvarez
hace más de 6 años
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Pregunta 1
Pregunta
Reactions that absorb hear are called [blank_start]endothermic[blank_end]
Respuesta
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endothermic
Pregunta 2
Pregunta
The energy used or produced during a chemical reaction is called the [blank_start]enthalpy[blank_end]
Respuesta
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enthalpy
Pregunta 3
Pregunta
[blank_start]Hess's[blank_end] law says that the (triangle H) for reactions are additive
Respuesta
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Hess's
Pregunta 4
Pregunta
The [blank_start]specific heat (c)[blank_end] of a substance tell how much energy is needed to raise the temperature of 1 gram of that substance by 1ºC
Respuesta
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specific heat (c)
Pregunta 5
Pregunta
1 calorie is equal to [blank_start]4.814[blank_end] joules
Respuesta
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4.814
Pregunta 6
Pregunta
An [blank_start]exothermic[blank_end] reaction is one that gives off heat
Respuesta
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exothermic
Pregunta 7
Pregunta
The amount of energy required to raise the temperature of 1 gram of pure water by 1ºC is exactly equal to one [blank_start]calorie[blank_end]
Respuesta
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calorie
Pregunta 8
Pregunta
[blank_start]Heat[blank_end] is the type of energy that alwats flows from warmer objects to cooler one
Respuesta
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Heat
Pregunta 9
Pregunta
[blank_start]Thermochemistry[blank_end] is the study of heat changes during chemical and physical changes
Respuesta
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Thermochemistry
Pregunta 10
Pregunta
If a reaction is reversed, the (triangle H) for the reaction must be [blank_start]changed to opposite sign[blank_end]
Respuesta
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changed to opposite sign
Pregunta 11
Respuesta
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A) Liquid: q=mc(triangle T)
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B) Boil: (Traingle H)fus
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C) Gas: q=mc(triangle T)
Pregunta 12
Pregunta
The type of reaction that absorbs heat from the surroundings
Respuesta
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Endothermic
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Exothermic
Pregunta 13
Pregunta
A chemical equation that includes the enthalphy change
Respuesta
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Thermochemical equation
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Phase change equation
Pregunta 14
Pregunta
When a reaction requires energy in order to be completed, this energy can be written on the ___ side of a chemical equation
Respuesta
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Right
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Left
Pregunta 15
Pregunta
The heat content of a substance
Respuesta
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Specific Heat
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Enthalpy
Pregunta 16
Pregunta
In order to melt a substance, energy is ___
Respuesta
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Absorbed
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Released
Pregunta 17
Pregunta
Describes the additive nature of chemical equations and heat changes
Respuesta
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Hess's Law
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Thermochemistry
Pregunta 18
Pregunta
The heat absorbed by 1 mole of a substance in boiling from a liquid to a gas at a constant temperature
Respuesta
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(Triangle H)fus
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(Triangle H)vap
Pregunta 19
Pregunta
The fact that equals masses of both water and copper, when supplied with identical energy amounts of energy amounts of energy heat up at different rates is due to their ___
Respuesta
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Specific Heat
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Chemical Potential Energy
Pregunta 20
Pregunta
How many kJ of energy can be released by a banana containing 150 calories?
Respuesta
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A) 6.3x10^5 kJ
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B) 0.028 kJ
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C) 36 kJ
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D) 630 kJ
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E) None of these
Pregunta 21
Pregunta
For the question below, use the following equation: I2(s) + 62.4 kJ --> I2(g)
Which of the following is true?
Respuesta
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A) The reaction is exothermic
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B) (Triangle H)= +62.4 kJ
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C) (Triangle H)= -62.4 kJ
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D) The reaction releases heat
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E) Not enough information to tell
Pregunta 22
Pregunta
For the question below, use the following equation: I2(s) + 62.4 kJ --> I2(g)
How much heat is involved in the production of 3.5 mole I2(g)
Respuesta
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A) 110 kJ
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B) 62 kJ
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C) 220 kJ
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D) 3.5 kJ
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E) None of these
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