Chem T/F chapter 15

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heat capacity

"C" for water is 4.184

how many joules in 800 CAL?

800CAL x 1000cal/1CAL x 4.184/1cal = 3347200J

A calorie is the SI unit of heat and energy

FALSE- JOULE

A calorie is the amount of energy required to raise the temperature of one gram of pure water by one degree celsius.

TRUE

Heat is a form of energy that flows from a warmer object to a cooler object.

TRUE

Kinetic energy is energy of motion

TRUE

One calorie equals 4.184 joules

TRUE

energy is the ability to do work or produce heat. T/F

TRUE

specific heat

any substances is the amount of heat required to raise the temp of one gram of that substance by one degree celsius

endothermic

energy enters reaction on reactant side

exothermic

heat being released

endothermic process

heat coming in

energy

is the ability to do work or produce heat. it exists in 2 basic forms. Potential and Kinetic

Thermochemistry

is the study if heat changes that accompany chemical reactions and phase changes

Joule

the SI unit of energy and heat 1 calorie = 4.184 J

calorie

the amount of energy required to raise the temperature of one gram of pure water by one degree Celsius

chemical potential energy

the energy that is stored in a substance because of its composition

The specific heat of a substance is the amount of heat required to raise the temperature of one gram of that substance by one degree Celsius.

TRUE

To convert kilojoules to joules, divide the number of kilojoules by 1000 joules/1 kilojoule.

TRUE

When fuel is burned, some of its chemical potential energy is lost as heat.

TRUE

law of conservation of energy

states that in any chemical reaction or physical process, energy can be converted from one to another, neither created nor destroyed

heat

symbol 'q' which is energy that is in the process of flowing from a warmer object to a cooler

Heat of combustion

the quantity of thermal energy given off when a certain amount of substance burns

exothermic

energy exits the reaction on the product side

*** ENERGY MUST BE ADDED TO PULL ATOMS APART

...

Chemical potential energy is energy stored in a substance because of its composition.

FALSE

Chemicals participating in a chemical reaction contain only potential energy.

FALSE

One nutritional Calorie is equal to 100 calories

FALSE


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