You take an ice cube (mass = 18g) from the freezer (T=-10°C) and place it on the table. Later that day, you notice a puddle of w

Question

3 years ago

11

You take an ice cube (mass = 18g) from the freezer (T=-10°C) and place it on the table. Later that day, you notice a puddle of w

ater on the table that has reached ambient room temperature (20°C). How much heat must have been absorbed to make this happen? A) 1867.0 J B) 2260.4 J C) 7897.0 J D) 42657.0 J

Chemistry

2 answers:

Usimov [2.4K] · Answer 1 · 2022-04-19T10:11:14+03:00

Usimov [2.4K]3 years ago

5 0

the correct answer is 7897.0 Joules

murzikaleks [220] · Answer 2 · 2022-04-19T07:57:17+03:00

The amount of heat absorbed or released by the system can be determined by the equation:

U = mCpΔT
where:
m = mass of material
Cp = specific heat capacity of material; in this case, Cpwater = 4.186 J/(g-°C)
ΔT = change in temperature of material

U = 18(4.186)(20-(-10)) = 2260.44 Joules or B.
A positive term means energy was absorbed.