Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074



Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

It is interesting how the Fahrenheit temperature scale was established. One report, given by Fahrenheit in a paper in 1724, stated that the value of 0 °F was established as the freezing temperature of saturated solutions of sea salt. From the literature we find that the freezing point of a 20% by mass solution of NaCl is −16.46 °C. (This is the lowest freezing temperature reported for solutions of NaCl.) Does this value lend credence to this story of the establishment of the Fahrenheit scale?

Interpretation Introduction


It has to be identified whether the given value lend credence to the given story of the establishment of the Fahrenheit scale.

Concept Introduction:

Ideal solutions: The solution in which interactions between molecules of the components does not differ from the interactions between the molecules of each component. For example the ideal solutions that conforms exactly to Raoult’s law it compare to the activity and activity co-efficient.

Melting point (or) freezing point: The pure crystal solids have a characteristic melting point, the temperature at which the solid melts to become a liquid. The transition between the solid and the liquid is so sharp for small samples of a pure substance that melting points can be measured to (0.10C). Further Liquids have a characteristic temperature at which they turn into solids, known as their freezing point.


Let us consider the Fahrenheit temperature formula

Here100°C=180°FThe celsius to FahrenheitF=95C+32

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