Which would heat up faster, which would cool down faster, and why?

Question

OKay the two things are water and a bunch of pebbles. Which will heat up faster(using a heat lamp) and which will cool down faster

Answer 1

water as its boiling point is 100 \C

Answer 2

Water will heat up slower because it has a high specific heat. Specific heat is the amount of energy that must be absorbed or lost by 1 gram of substance to change its temperature by 1 degree Celsius. It takes much more heat to warm up the water than the pebbles because of the hydrogen bonds that water molecules form with one another. It takes a large amount of thermal energy to break the hydrogen bonds before the individual molecules can move freely and thus have a higher temperature. The pebbles do not have these bonds so their temperature raises rather quickly. As for which one will cool faster, the pebbles will. The water holds its temperature longer becasue there is more heat added to the water than the pebbles because of the water's high specific heat. There is less heat energy added to the pebbles, so it will not retain its temperature as long.

Answer 3

Water will heat up faster. but things that heat up faster also lose their heat faster. So the water will cool down faster too.

Answer 4

Water would heat up at a faster rate.

Answer 5

that is because of density of the gadgets (the pebbles could be denser) and the specific warmth of each merchandise. Water's specific warmth is very severe, so it could take longer to warmth and likewise longer to settle down.