× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
5
a
5
k
5
c
5
B
5
l
5
C
4
s
4
a
4
t
4
i
4
r
4
Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
New Topic  
Smntnl Smntnl
wrote...
Posts: 122
Rep: 4 0
11 years ago
A 2.23g sample of hydrazine, N2H4, is burned in a bomb calorimeter that contains 6,410.28g of H2O, and the temperature increases from 25.00 degrees C to 25.95 degrees C. The heat capacity of the calorimeter is 3.76kJ/ degrees C. Calculate delta E for the combustion of N2H4 in kJ/g
Read 490 times
1 Reply

Related Topics

Replies
wrote...
#1
11 years ago
Heat released = 6410.28 x 4.18 x 0.95 + 3.76 x 1000 x 0.95 = 29.03 kJ

The impact of hydrazine mass can be ignored compared to the mass of the water.

Heat of Combustion = 29.03 / 2.23 = 13.0 kJ/g

The published value is more like 19.4 kJ/g

PS Check the maths
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1274 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 282
  
 222
  
 58
Your Opinion
Which industry do you think artificial intelligence (AI) will impact the most?
Votes: 352
Previous poll results: Does a gender wage gap exist in America?