Thermochemistry Review

What is a calorie?

• an amount of heat needed to raise the temp of water

• 4.184 J/g·°C

• .001 Calorie

• all of these

What does a calorimeter do?

• tells you if temperature is increasing or decreasing

• gives calorie content

• measures heat lost or gained during chem. or phys. process

• gives the identity of a chemical change

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Endothermic processes...

• absorb energy

• can only be chemical in nature

• the system loses energy

• release energy

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Energy...

• can run out

• must stay in only one form

• is the ability to do work

• is only slightly related to temperature

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Exothermic processes...

• will stay hot forever

• release energy

• involve an energy transfer where surroundings become warmer

• absorb energy

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Joule...

• is a calorie

• a misspelling of the word "jewel"

• unit for specific heat

• unit for energy (J)

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Energy cannot be created nor destroyed; it can only be transformed

• Law of Conservation of Matter

• total energy before and after a reaction stays the same

• energy of the system and surroundings stay the same

• Law of Conservation of Energy

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The amount of heat necessary to raise the temperature of 1g of any substance by 1 degree Celcius

• Calorie

• Specific Heat

• Joule

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What can be affected by the system?

• Surroundings

• Joule

• Universe

• Calorie

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The variable "m" in q = mcΔT stands for...

• Molarity

• Heat of a substance

• Specific Heat

• Mass

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