Author Question: Why is it that in cold winters a tub of water placed in a farmer's canning cellar helps prevent ... (Read 40 times)

sdfghj · **on:** Aug 27, 2018

Why is it that in cold winters a tub of water placed in a farmer's canning cellar helps prevent canned food from freezing?

A) As long as the water remains in the liquid phase, evaporation will give off heat to the cellar.
B) If the canned goods are in the tub of water, molecular interactions will keep them from freezing.
C) The cold in the cellar is consumed by freezing the water, not the canned goods.
D) The continual release of energy by the freezing water keeps the temperature of the cellar from going below 0C.

Question 2

True or False: Atoms with the greatest electronegativity are those with the fewest number of shells, but only when the number of valence electrons is the same. Explain.

A) False; Electronegativity increases with an increasing number of shells down any given atomic group (vertical column).
B) True; Except for the noble gas elements, electronegativity decreases with an increasing number of shells down any one atomic group (vertical column).
C) False; There is no direct correlation between electronegativity value and the number of shells in an atom.
D) True; except for the noble gas elements and the Lanthanide and Actinide Series elements