Chem thermo

Question 1

calorimetry

Answer 1

measurement of heat change

Question 2

calorimeter

Answer 2

device that measure the amt/ of heat absorbed/released

ex. styrofoam cup

Question 3

coffee cup calorimeter

Answer 3

record temp change as chem react

Question 4

bomb calorimeter

Answer 4

food lit on fire

Question 5

temp change is dependent on

Answer 5

1. amt. of heat added
2. mass of substance
3. composition of the substance

Question 6

specific heat (c)

Answer 6

amt. of heat needed to raise the temp of 1 gram of a substance by 1 celsius

Question 7

units of specific heat

Answer 7

cal/g’C

J/g’C

Question 8

specific heat of H2O

Answer 8

4.18 J/g’C

1 cal/g’C

Question 9

q=mct

Answer 9

q=heat (J or cal)
m=mass (g)
c= specific heat
t= change in temp (‘C), T final - T initial

Question 10

thermochemistry

Answer 10

study of heat changes

Question 11

energy

Answer 11

ability to do work/supply heat

Question 12

heat

Answer 12

form of energy

Question 13

temp

Answer 13

measure of heat

Question 14

chem potential energy

Answer 14

stored energy in bonds

Question 15

law of conservation of energy

Answer 15

energy can’t be created or destroyed only converted

Question 16

1 food calorie

Answer 16

1000 chem calorie

Question 17

1 cal

Answer 17

4.184 Joule

Question 18

Hess law

Answer 18

adding 2 equations and heat change

Question 19

how to add chem equations

Answer 19

• same element on opposite: cross out
• same element on same side: add coefficient
• simplify on opposite

Question 20

reverse chem equation

Answer 20

flip and then change signs on heat

Question 21

multiply/divide in chem equation

Answer 21

multiply or divide coefficient and heat by the same number