Intro to chemistryTherm

A. _______________ is the study of ______ changes that occur during chemical reactions and changes in state.

Thermochemistryenergy

o

Intro to chemistryTherm 1. Every substance has a certain amount of ______ inside it. The energy stored in the chemical _____ of a substance is called __________ _______ _____.

energy

bonds

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chemicalpotential energy

Intro to chemistryTherm2. The law of __________ of _____ states that in any chemical or physical process, _____ is neither created nor destroyed.

conservationenergy

o

energy

Intro to chemistryThermB. A major goal of thermochemistry is to examine the flow of ____ energy between a system and its surroundings.

heat

o

Intro to chemistryTherm1. ____, represented by ___, is energy that transfers from one object to another because of a __________ difference between the objects.

Q = mCΔT

Heat Qo

temperature

Intro to chemistryTherm a. Heat flows from a ______ object to a _____ object.

warmercooler

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Intro to chemistryThermb. If two objects remain in contact, heat will flow from the ______ object to the _____ object until the temperature of both is the ____.

warmer cooler

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same

Intro to chemistryTherm2. Heat is _______ from the surroundings in an __________ process.

absorbedendothermic

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Intro to chemistryTherm3. Heat is _______ into the surroundings in an _________ process.

releasedexothermic

o

Intro to chemistryThermo

Intro to chemistryThermo

Intro to chemistryTherm4. Heat flow is measured in two common units, the ______ and the ____. Joule

calorie

o

Intro to chemistryTherma. A _____, _, is defined as the quantity of heat needed to raise the temperature of ___ of pure water ___.

calorie co

1g1°C

Intro to chemistryThermb. The ____, _, is the quantity of heat that raises the temperature of __ of water _______.

Joule Jo

1g0.2930°C

Intro to chemistryThermC. The amount of heat needed to increase the temperature of an object exactly 1°C is the ____ ______ of that object.capacityheat

o

Intro to chemistryTherm1. The ____ ______ depends on both its ____ and its _______ composition.

heat capacityo

mass chemical

Intro to chemistryTherm2. The specific heat capacity, or simply ______ ____, C, of a substance is the amount of heat it takes to raise the temperature of 1g of the substance 1°C.

specific heat

o

Intro to chemistryTherm

C = Q = heat (J or cal) m x ΔT mass(g) x change in temp. °C

o