1. Because there is polyfoam around the vessel and the polyfoam is bad heat conductor.
2. So the heating apparatus’ contact area with the water is bigger and can heat the water faster.
3. Because the aluminum’s specific heat capacity is high (8800J/ (kg*K)) so it can be heat up very fast and can deliver the energy to the water and raise the water’s temperature.
4. I will choose copper. (Because Mr. Doyle said it should be copper!! :)
I choose copper is because copper also has high SHC, which is 3900J/kg/K and its melting point is 1083.4±0.2℃ higher than the AI. This means it can raise its temperature faster than water but won’t get melt or too hot as easy as AI does.
5. No, I do not. There should always be some difference.
The one we get is:
Q=cm△t
c=Q/m△t
Q=IUT
=1.5A*3V*7.47*60s
=2016.9J
c=2016.9J/ (167.5-30.1) x10^-3kg*2K
=7339.52J/kg (K)
2. So the heating apparatus’ contact area with the water is bigger and can heat the water faster.
3. Because the aluminum’s specific heat capacity is high (8800J/ (kg*K)) so it can be heat up very fast and can deliver the energy to the water and raise the water’s temperature.
4. I will choose copper. (Because Mr. Doyle said it should be copper!! :)
I choose copper is because copper also has high SHC, which is 3900J/kg/K and its melting point is 1083.4±0.2℃ higher than the AI. This means it can raise its temperature faster than water but won’t get melt or too hot as easy as AI does.
5. No, I do not. There should always be some difference.
The one we get is:
Q=cm△t
c=Q/m△t
Q=IUT
=1.5A*3V*7.47*60s
=2016.9J
c=2016.9J/ (167.5-30.1) x10^-3kg*2K
=7339.52J/kg (K)