Theloshua
  • Theloshua
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?
Chemistry
chestercat
  • chestercat
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Theloshua
  • Theloshua
-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
taramgrant0543664
  • taramgrant0543664
Well we can cross off c, the metal is colder then the water so the water will go down in temperature not up
taramgrant0543664
  • taramgrant0543664
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?

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Theloshua
  • Theloshua
I thought it would be a....
Theloshua
  • Theloshua
I knew c couldnt be right...
Theloshua
  • Theloshua
you there?
taramgrant0543664
  • taramgrant0543664
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
Theloshua
  • Theloshua
im also realizing d isnt an option either XD
taramgrant0543664
  • taramgrant0543664
Sorry it froze for a minute there
Theloshua
  • Theloshua
why does it matter? It's not asking a calorimetry equation...
Theloshua
  • Theloshua
n its okay
taramgrant0543664
  • taramgrant0543664
The answer is b because qgained=qlost Where q represents the energy
Theloshua
  • Theloshua
wait.....
Theloshua
  • Theloshua
oh, cauz it adjusts and equals out to the same temperature?
taramgrant0543664
  • taramgrant0543664
Yes they will have the same end temperature but it's not nessicarily the half way point between them
Theloshua
  • Theloshua
*sighs* Im confused...
Theloshua
  • Theloshua
......?
taramgrant0543664
  • taramgrant0543664
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
Theloshua
  • Theloshua
ohhhhh, and theres no way of calculating that without knowing what the metal is?
taramgrant0543664
  • taramgrant0543664
Exactly!!!!
Theloshua
  • Theloshua
okayyyyyy thats so simple haha, i feel stupid now. Your amazing!!! :*
taramgrant0543664
  • taramgrant0543664
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
Theloshua
  • Theloshua
haha, thats a more intelligent slip up then mine :D
Theloshua
  • Theloshua
may I ask where your experience is from? Like how do you know this stuff?
taramgrant0543664
  • taramgrant0543664
I'm going into my third year as a chemistry major
Theloshua
  • Theloshua
ohhhh, okay, thats cool, idk how you do chemistry constantly... :p you find it fun?
taramgrant0543664
  • taramgrant0543664
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
Theloshua
  • Theloshua
haha, thats really cool :D
Theloshua
  • Theloshua
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
taramgrant0543664
  • taramgrant0543664
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!
Theloshua
  • Theloshua
youve been here 50 days and have almost 200 fans? O.o
taramgrant0543664
  • taramgrant0543664
There's people that have been on for less time and have more
Theloshua
  • Theloshua
okay, i guess haha your pretty btw ;D I tend to not let guys help me, It makes me uncomfortable, idk why *shrug*
taramgrant0543664
  • taramgrant0543664
Everyone has their own preferences
Theloshua
  • Theloshua
yepp...
Theloshua
  • Theloshua
anywayyy... Ill leave you alone now and let you do our thing :D hanks again!!
Theloshua
  • Theloshua
your*
Theloshua
  • Theloshua
thanks*
taramgrant0543664
  • taramgrant0543664
Haha no problem anytime!

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