The data from an experiment that monitors the change in mass as a function of ti

Question

The data from an experiment that monitors the change in mass as a function of time of liquid nitrogen as it evaporates inside a styrofoam cup is fitted to the equation y=Aexp(-x/B)+C

If the parameter C has a negative value, what can be concluded? (select all that applies)

A. The styrofoam cup has a negative mass.
B. The evaporation of the liquid nitrogen obeys Newton’s Law of Cooling.
C. The evaporation of the liquid nitrogen does not obey Newton’s Law of Cooling.
D. The mass of the styrofoam cup was not correctly provided by the fit.
E. The initial cooling rate was greater than that predicted by Newton’s Law of Cooling.

Explanation / Answer

The answer is C

The evaporation of the liquid nitrogen does not obey Newton’s Law of Cooling because c is the initial value, the initial mass would be negative.

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