A metal pellet with a mass of 100.0 g, originally at 95°C, is dropped into a 218 g sample of water, initially at 23.8°C. Calculate the final temperature of the water and pellet. The specific heat of water
is 4.184 J/g.°C. The specific heat of the pellet is 0.568 J/g.°C.
A. 28.0 C
B. 72.0 C
C. 95.0 C
D. 41.3 C
E. 23.8 C

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Explanation:

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the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error