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I Need Help With This Question {chemistry} - Education - Nairaland

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I Need Help With This Question {chemistry} by JABAIDO(m): 11:15pm On Dec 10, 2019
Good evening here.
Pertinent to the topic, please I need anyone who knows how to go about the question below to help me with the working and answer:
"Some students added 4g of NaOH to 100ml of water in a practical class using a calorimeter for the experiment. After the addition, the temperature of the solution rose by 20°C and the specific heat capacity of water is 4.18kj/g/°C. Determine the molar enthalpy of solution"
I shall be appreciative embarassed �
Re: I Need Help With This Question {chemistry} by GLYMAN: 12:54am On Dec 11, 2019
ANSWER=0.836MkJ/g

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Re: I Need Help With This Question {chemistry} by JABAIDO(m): 3:07am On Dec 11, 2019
GLYMAN:
ANSWER=0.836MkJ/g
Thanks sir. Could you display the working sir?

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Re: I Need Help With This Question {chemistry} by JABAIDO(m): 8:38am On Dec 11, 2019
Pls, if you come across this and you know how to solve it, I take God beg you spare me few minutes of your time. I need the working urgently....
Re: I Need Help With This Question {chemistry} by GLYMAN: 12:38pm On Dec 11, 2019
4g of NaOH to 100ml of water---convert to mol/dm3

NaOH=40g/mol

100ml=0.1dm3

4 divided by 40 times 0.1=0.01mol/dm3

Molar enthalpy of solution =Molarity X specific heat capacity X change in temperature=0.01 X 4.18 X 20

Mind the units

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