week 12

Question 1

first law of thermodynamics

Answer 1

energy cannot be created nor destroyed

Question 2

thermal energy

Answer 2

kinetic energy associated with random motion of atoms and molecules

Question 3

temperature

Answer 3

quantitative measurement of “hot” or “cold”

Question 4

rel’p between thermal energy and temp in matter

Answer 4

proportional

Question 5

substances ____ as temp decreases and ________ as temp increases

Answer 5

contract, expand

Question 6

what does q represent

Answer 6

heat

Question 7

define heat

Answer 7

transfer of thermal energy between 2 bodies at dif temps
(heat flow continues until equilibrium when 2 bodies remain in contact)

Question 8

calorie

Answer 8

amount of energy required to raise one gram of water by 1 degree celsius

Question 9

Calorie

Answer 9

1000 calories (kcal)

Question 10

cal to joule

Answer 10

1 cal = 4.184J

Question 11

what is a joule

Answer 11

SI unit of heat, work, and energy
amount of energy used when a force of 1 newton (N) moves an object 1m

Question 12

heat capacity

Answer 12

amount of heat (q) absorbed or released when deltaT changes by 1 degree C

Question 13

is heat capacity extensive or intensive

Answer 13

extensive - depends on amount. also intensive bc depends on material

Question 14

heat capacity symbol

Answer 14

C

Question 15

C =

Answer 15

C = q/deltat

Question 16

Specific heat capacity

Answer 16

amount of heat to raise the temperature of 1 gram of a substance by 1C
intensive property

Question 17

specific heat capacity symbol

Answer 17

c

Question 18

c =

Answer 18

c = q/m*deltat

Question 19

q =

Answer 19

q = mc(deltat)