Q = Heat energy, if there was a temperature gained in a substance, this would be the heat energy "gained" in a substance.
If there was a temperature drop in a substance, this would be heat energy "lost" in a substance.
m = m for 'mass' as always, since you're trying to figure out how much
heat energy that was applied, it will depend on the weight or in correct
terms the "mass" of the the object.
c = basically it's a measure of how much heat energy the substance
absorbs to change the temperature by 1 degree Fahrenheit/Celsius. (the
unit for specific heat capacity is J kg^-1 K^-1)......(^ = to the power
Delta t = (t2 - t1): This can be the rise in temperature or the fall in temperature.
Oh, it now makes sense: Q = mLf + mc*delta(t) if you need to use this equation, then you've solved correctly. But you need to add both equations to get final result: Total Q = 5400 joule + 836 joule = 6236 joule