During the chemical reaction that takes place inside a hot pack, is energy being released to the surroundings or taken in from the surroundings and why?

Energy is taken in because all chemical reactions take in energy.
Energy is released because the temperature of the surroundings increases.
Energy is taken in because the temperature of the surroundings increases.
Energy is released because all chemical reactions release energy.
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Energy is released because the temperature of the surroundings increases.

Explanation:

"Energy is released because the temperature of the surroundings increases" is true because when the temperature of the hot pack increases, that means that energy (heat/thermal) is being released.

"Energy is taken in because the temperature of the surroundings increases" is false because energy is actually being released in this chemical reaction.

"Energy is taken in because all chemical reactions take in energy" is false because energy is being released in this reaction and not all chemical reactions absorb energy.

"Energy is released because all chemical reactions release energy" is false because not all chemical reactions release energy.

answer: the figure is attached herewith.

step-by-step explanation:   we are given to sketch a unit circle and label the terminal points corresponding to

in the attached figure, we have drawn a unit circle, with centre at o(0,0) and radius 1 unit. we have labelled the points a, b, c, d and e corresponding to the angles below

∠aox = 60°,

∠box = 120°,

∠cox = 180°,

∠dox = 240°,

∠eox = 300°.

and the coordinates are a(0.5,1), b(-0.5,1), c(-1,0), d(-0.5,-1) and e(0.5,-1).

thus, the answer is complete.

answer: the primary difference between a hypothesis and a theory is that b hypothesis is falsifiable, but a theory has been proven to be correct. theory is an explanation of something that is happening but hypothesis is a guess of something that can happen

explanation: