- #1
grahamreitz
- 1
- 0
Hello PF,
Is the following calculation correct for the amount of time it would take to raise the temperature of a given mass of material?
Q = heat in J
W = watts
m = mass in kg
c = specific heat in J/kgC
Tf = temperature final
Ti = temperature initial
Q = m * c * (Tf - Ti)
m = 5 g = 0.005 kg
c = 450 J/kgC (Nichrome)
Tf = 45 C
Ti = 15 C
Q = (0.005) * (450) * (45 - 15) = 67.5 J
W = 14
Time to heat material from 15 C to 45 C at 14 W:
t = J / W = (67.5 J)/(14 W) = 4.82 s
I'm not measuring this empirically. Although, my temperature probe is a little slow.
Thanks,
Graham
Is the following calculation correct for the amount of time it would take to raise the temperature of a given mass of material?
Q = heat in J
W = watts
m = mass in kg
c = specific heat in J/kgC
Tf = temperature final
Ti = temperature initial
Q = m * c * (Tf - Ti)
m = 5 g = 0.005 kg
c = 450 J/kgC (Nichrome)
Tf = 45 C
Ti = 15 C
Q = (0.005) * (450) * (45 - 15) = 67.5 J
W = 14
Time to heat material from 15 C to 45 C at 14 W:
t = J / W = (67.5 J)/(14 W) = 4.82 s
I'm not measuring this empirically. Although, my temperature probe is a little slow.
Thanks,
Graham