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Challenge: Problem 3

Continuous flow calorimetry is the most accurate way of measuring the specific heats of gases and liquids. Fig. 1.9 shows the method applied to determine the specific heat of a liquid. Study the diagram carefully. Consider the basic features of the apparatus and the measurements which are possible, from which one is able to write down an equation in terms of measurable quantities and the unknown specific heat. Select corresponding items from the Array. Can you find any items which indicate the function of some of the labelled parts of the apparatus-such as the copper sheaths, for example?

3
constant temperature distribution
4
mass
8
radiation losses
16
insulation against conduction or convection
13
condensation of saturated vapour
10
temperature rise
18
cooling inside the enclosure
2
flow of mass
12
specific heat of substance
1
latent heat of steam
9
transfer of heat by vapour
15
large surface area
7
temperature gradient
17
pressure
6
transfer of heat from electrical element
20
thermal expansion
19
unwanted conduction of heat
14
rate of temperature drop
11
high thermal conductivity
5
unwanted condensation of vapour