# IPC

i have no idea how to do this at all please explain...

The specific heat capacity of copper is 0.09 cal/g°C. How much energy is needed to flow into a 10-gram sample to change its temperature from 20°C to 21°C?

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1. the energy needed to increase or decrease the temperature of a given substance is given by
Q = mc(T2-T1)
where
Q = heat (in J or cal)
m = mass (in g)
c = specific heat capacity (in J/g*K or cal/g*K)
T = temperature (in Kelvin)
**change in temperature can have unit degree Celsius or Kelvin,, thus you can use it interchangeably (what i mean is that the units for c can also be J/(g*C))
signs:
Q: (+) when heat is absorbed by substance
Q: (-) when heat is released from substance

therefore:
Q = (10)(0.09)(21-20)
Q = 0.9 cal
note that it is positive since it ABSORBED heat to RAISE its temperature.

hope this helps~ :)

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posted by Jai
2. Okayy thank you! :) That makes sence now lol

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