Chem quiz

Thermochemistry

• the study of heat changes that occur during chemical reactions and physical changes of state

• the ability to do work or supply heat

• a form of energy

  -flows from warmer objects to cooler objects

• Potential energy is converted to heat (heat is given off - feels hot)

Energy

• Is the accurate and precise measurement of heat change for chemical and physical processes

• A chemical equation which includes the energy used or produced in a chemical reaction.

• the ability to do work or supply heat

• it can't be negative

  -change to positive

heat

• (q) a form of energy

  -flows from warmer objects to cooler objects

• the study of heat changes that occur during chemical reactions and physical changes of state

• (H) Heat content of a substance at constant pressure (Heat of a reaction)

• (c) amount of heat required to raise the temperature of 1 gram of a substance by 1 ̊C

Heat energy (being added)

• (H) Heat content of a substance at constant pressure (Heat of a reaction)

• Is the accurate and precise measurement of heat change for chemical and physical processes

• Potential energy is converted to heat (heat is given off - feels hot)

• molecules move faster; temperature increases

Exothermic

• the ability to do work or supply heat

• chemistry calorie

• Potential energy is converted to heat (heat is given off - feels hot)

• Is the accurate and precise measurement of heat change for chemical and physical processes

Endothermic

• Heat is absorbed and converted to potential energy (feels cool)

• Potential energy is converted to heat (heat is given off - feels hot)

• Is the accurate and precise measurement of heat change for chemical and physical processes

• (c) amount of heat required to raise the temperature of 1 gram of a substance by 1 ̊C

Law of Conservation of Energy

• the study of heat changes that occur during chemical reactions and physical changes of state

• the ability to do work or supply heat

• (c) amount of heat required to raise the temperature of 1 gram of a substance by 1 ̊C

• Energy can neither be created nor destroyed, only converted from one form to another

Joule (J)

• 1 food Cal = 1000 chemistry cal

• 1 cal = 4.184J

• 4.18 J/g ̊C or 1.00 cal/g ̊C

• heat (J or cal)

calorie (cal) lower case "c"

• (c) amount of heat required to raise the temperature of 1 gram of a substance by 1 ̊C

• A chemical equation which includes the energy used or produced in a chemical reaction.

• Is the accurate and precise measurement of heat change for chemical and physical processes

• chemistry calorie