hello all, I have gone back to college after many years to study. While I have worked on many systems I do not have a qualification in enginering and that is what I am trying to get now. My area of interest is in heat transfer. We were asked a question in the course and I think I know the answer. I will give you the question and then I will give you my answer and the reason why I think I am correct.
Q: If you put a container of 1kg of water at 0degC into a container containing 10kg of water at 50degC what will the final temperature be (approximately) when the system finishes heat transfer. We have to make the following assumptions: We do not loose any heat to the outside or to through the container walls. (I don't know how to add a picture, so it is a bit difficult to explain in writing).
My answer is a that the water will be at around 45degC. My logic was that at 50degC the 10Kg of water has 2093KJ of heat energy and for every 4.186KJ that is transferred from the 10kg of water to the 1Kg of water will cause the 1Kg of water to increase by 1degC and cause the 10Kg of water to decrease by 0.1degC. Therefore at approximately 45degC both temperatures are the same and not heat transfer will occur.
We had the same question again but the temperature and mass of the heating water was now 100degC and 100kg. Using the same logic and assumptions I think the answer is approximately 99degC.
Based on the assuptions above is the answer, or more importantly, my logic correct? If my logic was right but I some how came up with the wrong answer then that is not a bit issue but if my logic was wrong and I came up with the correct answer then that would be a problem for me in the long run.
Please correct my usage of incorrect terms where appropriate. I am looking forward to your constructive feedback.
Thank you in advance for your patience and time.
Michael
Heating Transfer
Re: Heating transfer
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