Physics Help Forum Callender and Barnes' Continuous Flow Method

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 Jul 10th 2013, 06:34 AM #1 Junior Member   Join Date: Jul 2013 Posts: 1 Callender and Barnes' Continuous Flow Method Hi there, I was revising through my Thermal Physics notes and found that they weren't very detailed in describing the Continuous Flow Method for measuring Specific Heat Capacity of a liquid. It says that by adjusting the current and potential when using a different mass flow rate till temperatures at the inlet and outlet are the same for the 2 sets of data, the rate of heat loss to the surrounding is constant. Here's my questions: What exactly is the heat loss from? By radiation from the water and heating coil? Why is it that maintaining constant temperatures at inlet/outlet makes the rate of heat loss to surroundings constant? My understanding is that since a different mass flow rate is used, shouldn't rate of heat loss change? As the mass of water flowed through per unit time is different and thus heat loss from a different mass of water is different? Thanks!
 Jul 10th 2013, 01:42 PM #2 Senior Member   Join Date: Jun 2010 Location: NC Posts: 418 Apparatus... Hi taenyfan: Is there an apparatus schematic for this event? Or what is the measurement technique called? Thanks, JP
 Jul 11th 2013, 10:05 AM #3 Senior Member     Join Date: Apr 2008 Location: Bedford, England Posts: 668 I am not familiar with this method. Do you perhaps calibrate it with known fluids? If so then I'm guessing that the difference in flow-rate needed to maintain the same temperature gradient for different fluids will be a measure of the differences in Specific Heat Capacity of the different fluids.

 Tags barnes, callender, continuous, flow, method

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