# Chem

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What is the amount of energy of calories to heat 8.5g of water from 15 C to 36 C?

I think you take 8.5g x 21 degree C, but then I am stuck. Thank you

• Chem -

amount of energy absorbed or released is given by
Q = mc*(T2 - T1)
where
Q = heat (in Joules)
m = mass (in grams)
c = specific heat capacity (J/g-K)
T = temperature (in Celsius or Kelvin)
*note that Q is (+) if the object absorbed heat, and (-) if it released heat.
for water, c = 4.184 J/g-K (you can find this in books or you can google this)
substituting,
Q = 8.5*4.184*(36-15)
Q = ?
now solve for Q. units in Joules.

hope this helps~ :)

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