Question

#1: Which of the following measures thermal energy in an object?

A. temperature

B. mass

C. heat

D. volume

**my answer; C. heat
is that right @aaronq ? :)

Answer 1

#2: In a calorimeter, 10 g of ice absorbs heat with an enthalpy of fusion of 334 J/g. What is the heat absorbed? q = m ΔHf (use the table attached!)

A. 6.68 J

B. 334 J

C. 3.34 kJ

D. 6.68 kJ

***i don't get this one :(

Answer 2

#3: REfer to the same graph as i attached for #2! :)

How much heat do you need to raise the temperature of 150 g of ice from 30oC to 15oC?

A. 4.61 kJ

B. 4.68 kJ

C. 5.49 kJ

D. 9.40 kJ

***my answer; D

is that right?

Answer 3

1st question A temperature

Answer 4

#4: In which of the following attached thermochemical equations would the ΔH be considered a heat of solution?

answer choices A,B,C,D from top to bottom :)

***my answer; B

is that right? :)

Answer 5

1 is good

for 2, use: q = m ΔHf

m=10g, ΔHf=334 J

Answer 6

nope temperature is average kinetic energy

Answer 7

hey aaronq pleaseeeeee help me, and 1 is temp

Answer 8

#5: In a calorimeter, 100 g of ice melts at 0oC. The enthalpy of fusion of the ice is 334 J/g. How much heat was absorbed?

A. 33.4 J

B. 334 J

C. 33.4 kJ

D. 334 kJ

***my answer: C

is that right? :D

Answer 9

yay for 1! haha and so is #2 this? B. 334 J ??

Answer 10

3. raise the temp form 30 to 15? what

Answer 11

sorry, i totally forgot.. lol it's -30 to -15 haha sorry!! does that make more sense @aaronq ? lol my badd :p

Answer 12

and so was #2 B then? :)

Answer 13

2 is not B :) you're not converting units correctly

Answer 14

3. q=150g(2.08)(-15) is that what you set up?

Answer 15

4 yes, because (aq)

Answer 16

ah darn. i knew it! lol so #2 should be C. 3.34 kJ then right? :)

and yeah i did haha :P at least i think i did lol

Answer 17

5 is good!

Answer 18

yep! it's C

Answer 19

haha if you did, then it's right

Answer 20

ohhh wait, so should #3 be B. 4.68 kJ ? :)

Answer 21

cuz i just calculated it... :/ but I'm not sure now hahaa wait so #3 is B then? Or is it D? :/ lol

Answer 22

yay for 2, 4 and 5! :D

Answer 23

3 is B, yes

Answer 24

kay aweosme! thnaks :)

Answer 25

no problemm !