Monday, May 24, 2010

Chem 10 question do you know the answer?

The specific heat capacity of silver is 0.24 J/g/°C. Express this in terms of kilocalories per gram per Celsius degree.


kcal/g/°C

Chem 10 question do you know the answer?
1 calorie is approximately equal to 4,184 Joules (from now on calorie=cal and Joule=J), so:





0.24 J/g/ºC x 1 cal / 4,184 J = 0.057 cal/g/ºC =57 kcal/g/ºC





1 cal and 4,184 J are equivalent, so you can multiply any result this way (by the appropiate factor) to change the units.


Another examples could be (all are equivalent):





1 atmosphere = 101325 Pascal


1 Newton = 1 Kg/m s^2


1 electronvolt = 1,6x10^-19 Joules





and so on ... see the link below for more conversion factors.





This is the maths section, next time try in the Chemistry or Physics one :)
Reply:4.184 J= 1 cal





specific heat capacity of silver= 0.24 J/4.184 cal /g/C


= 0.05736 cal/g/C


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