Question

.Professor Conlin was in charge of making dinner one night. He used a gas oven to heatup a frozen chicken pot pie. It started out at a temperature of about32°F(0°C). It took a long time to thaw out, but then the temperature quickly rose up to 199°F. Prof. Conlin is wonderinghow much it cost him to heat up the chicken pot pie with his gas oven. You’re going to help him figure it out!(a)First, find the final temperature in degrees Celsius. (b)Second, calculate the heat Q (in Joules) needed to thaw out the chicken pot pie. We can assume that it was the water content of the pie that was frozen, so you can use the latent heat of fusion for water. The pie was about 1.5 pounds, which works out to mass of about 0.68 kg. (c)Third calculate the heat Q(in Joules) needed to increase the temperature of the pie from 32 F to 202 F.(d)Fourth, usethe total amount of heat (in Joules) used to cook dinnerto calculate the cost. On his gas bill, Prof. Conlin sees that National Grid charges $0.60 per therm, and 1?ℎ???=1.055×10K?. Did cooking the pie cost more or less than a penny?

Answer 1

Im having two problems in this question the temp difference in question and in part d is not matching its 199 and 201 .

Secondly i think the enrgy of per therm should have some power over 10 other wise it will b too much expensive.

The value which is in tbe question according to that i have answered it. Please do chechk for the appropriate question.

Yes it will cost way more than a peny accroding to that i1 burn rate.

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