Question

A 20 gram piece of metal is added to a sample of 100 grams of water inside a calorimeter. If the metal is at a temperature of -5° Celsius and the water is at 20° Celsius, which of the following best describes what will occur inside the calorimeter?

Answer 1

-The final temperature of the water will be 15 degrees Celsius
-The energy gained by the metal equals the energy lost by the water
-The final temperature of the water will be higher than the initial temperature
-The temperature lost by the water will equal the temperature gained by the metal

Answer 2

Well we can cross off c, the metal is colder then the water so the water will go down in temperature not up

Answer 3

We also know that it can't be D, this is because there is different masses involved and there will different heat capacities therefore the temperature lost and gained will not equal each other
Do you have an idea of which one it is between a and b?

Answer 4

I thought it would be a....

Answer 5

I knew c couldnt be right...

Answer 6

you there?

Answer 7

The thing with that answer though is that we don't know the metal and therefore we don't have the heat capacity for it

Answer 8

im also realizing d isnt an option either XD

Answer 9

Sorry it froze for a minute there

Answer 10

why does it matter? It's not asking a calorimetry equation...

Answer 11

n its okay

Answer 12

The answer is b because qgained=qlost
Where q represents the energy

Answer 13

wait.....

Answer 14

oh, cauz it adjusts and equals out to the same temperature?

Answer 15

Yes they will have the same end temperature but it's not nessicarily the half way point between them

Answer 16

*sighs* Im confused...

Answer 17

......?

Answer 18

The energy lost by the water is the same as the energy gained by the metal. Both the water and metal will end at the same temperature. It could be any number between 20 and -5 depending on the conditions of the reaction and unless you know all conditions you can't specifically say a temperature and chances are it's not going to be the half way point between the two temperature so it won't be 7.5 Celcius

Answer 19

ohhhhh, and theres no way of calculating that without knowing what the metal is?

Answer 20

Exactly!!!!

Answer 21

okayyyyyy thats so simple haha, i feel stupid now. Your amazing!!! :*

Answer 22

It's no problem at all and don't feel stupid I thought NaOH was apparently a salt when I know it's a base because I was thinking NaCl, so you're not stupid at all

Answer 23

haha, thats a more intelligent slip up then mine :D

Answer 24

may I ask where your experience is from? Like how do you know this stuff?

Answer 25

I'm going into my third year as a chemistry major

Answer 26

ohhhh, okay, thats cool, idk how you do chemistry constantly... :p you find it fun?

Answer 27

I absolutely love chemistry it's the one thing that clicked with me in high school, this first semester back I have 30 hours of chem a week so I get to do a bunch of really fun labs that a lot of people would rather bang their head against the wall instead of do but I find them fun

Answer 28

haha, thats really cool :D

Answer 29

well I fanned you so I will definetely contact you in the future if I'm having problems ;) Im new to open study, but I like it alot so far

Answer 30

It's pretty good here I've been on for about 50 days now and I've been on every day helping some one I find it enjoyable!

Answer 31

youve been here 50 days and have almost 200 fans? O.o

Answer 32

There's people that have been on for less time and have more

Answer 33

okay, i guess haha
your pretty btw ;D
I tend to not let guys help me, It makes me uncomfortable, idk why *shrug*

Answer 34

Everyone has their own preferences

Answer 35

yepp...

Answer 36

anywayyy... Ill leave you alone now and let you do our thing :D
hanks again!!

Answer 37

your*

Answer 38

thanks*

Answer 39

Haha no problem anytime!