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t = 45°C
m = 400g = 0,4 kg
Q = c * m* t
c = Q / m*t
c = 2340 / 45 * 0,4
c = 2340 / 18
c = 130 J / kg * °C
400g=....kg
1g=0,001kg
400g=400*0,001kg=0,4kg
Cw=2340J/0,4kg*45⁰C
Cw=2340J/18 kg* ⁰C
Cw=130J/kg*⁰C