[drummerchic00]

PLZ help me.
If 13.34 g of an unknown substance loses 40.8 J of heat in cooling from 50.0 degrees Celsius to 43.0 degrees Celsius, what is the specific heat of the unknown?
Plz explain to me how to find the answer

[Donaldson Tan]

specific heat refers to specific heat capacity, ie. the amount of heat needed to raise the temperature of a unit amount of subtance by one unit temperature. Its SI unit is J.Kg^-1K^-1

Using Q = mc(dT) where
Q: heat applied
m: mass of substance
c: specific heat capacity
dT: change in temperature

-40.8J = (13.34 x 10^-3 kg) X c X (43 - 50 K)

rearrange the above equation to solve..