The discussion revolves around calculating the heat consumed to raise the temperature of ice from -20 Celsius to its melting point at 0 Celsius, along with inquiries about the time required for this process.
Some participants have provided calculations and attempted to derive the mass of the ice and the heat required. However, there are concerns about the correctness of the heat capacity used and the units in the derivations. Multiple interpretations and approaches are being discussed, with no explicit consensus reached.
There is a lack of information regarding the mass of the ice, and participants are questioning the assumptions made about the heat capacity, specifically whether to use that of ice or liquid water.
You will have to provide a bit more information. How much ice are we talking about? Does the heat source provide 300 W?Firben said:1. How much heat ΔQ is consumed to raise the ice temperature from Ti = -20 Celsius to meltingpoint Tf = 0 ? how long does it take ?
2. dQ/dt = H = 300 W
dQ = cmΔT
3 I got it to be 2.49 * 10^-21 J. Is it right ?