March 06, 2021, 08:59:07 AM
Forum Rules: Read This Before Posting

### Topic: Find the heat capacity of the calorimeter.  (Read 4952 times)

0 Members and 1 Guest are viewing this topic.

#### curiouscat

• Chemist
• Sr. Member
• Posts: 3005
• Mole Snacks: +121/-35
##### Re: Find the heat capacity of the calorimeter.
« Reply #15 on: November 30, 2012, 06:23:34 AM »
What's the MW of C6H5NH2?  You will need it.

Quote
If ΔHrxn=qrxn and q= C*ΔT, then C =j/°c and q=j. Then doesn't ΔH = j instead of J/moles?

You are confusing people by using non standard notation. Joules ≡ J and never j.

Even better practice is to always define your notation.

#### curiouscat

• Chemist
• Sr. Member
• Posts: 3005
• Mole Snacks: +121/-35
##### Re: Find the heat capacity of the calorimeter.
« Reply #16 on: November 30, 2012, 06:31:41 AM »
The K is actually a lower case k but I don't think that is the confusion.

It may not be the confusion in this case, yet get into the habit of doing notation right. Notation is important.

Kilo- (symbol: k, lowercase)

Always kJ and never KJ

#### anujfr

• Regular Member
• Posts: 9
• Mole Snacks: +0/-0
##### Re: Find the heat capacity of the calorimeter.
« Reply #17 on: November 30, 2012, 07:52:42 AM »
The right answer is 6.84 kJ/°C

What's the MW of C6H5NH2?  You will need it.
What is MW??

#### Borek

• Mr. pH
• Deity Member
• Posts: 26313
• Mole Snacks: +1711/-402
• Gender:
• I am known to be occasionally wrong.
##### Re: Find the heat capacity of the calorimeter.
« Reply #18 on: November 30, 2012, 08:01:21 AM »
Molecular Weight, or Molar Weight.
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info, pH-meter.info

#### anujfr

• Regular Member
• Posts: 9
• Mole Snacks: +0/-0
##### Re: Find the heat capacity of the calorimeter.
« Reply #19 on: November 30, 2012, 08:54:11 AM »
Sorry but I am confused. Do you want the Molecular mass * 9.8 or just the mass. I am confused because you said weight which is mass * acceleration due to gravity.

#### curiouscat

• Chemist
• Sr. Member
• Posts: 3005
• Mole Snacks: +121/-35
##### Re: Find the heat capacity of the calorimeter.
« Reply #20 on: November 30, 2012, 09:01:35 AM »
Sorry but I am confused. Do you want the Molecular mass * 9.8 or just the mass. I am confused because you said weight which is mass * acceleration due to gravity.

Why don't you think about it a bit? Have you seem Molecular Mass * 9.8 being used in a ThermoChem Context?

Even better if you are so wracked by doubt report both.  My point is let's start doing some number crunching.