A sample of water drops from an initial temperature of 67.5 C to a final temperature of 25.2 C. If -4425 J of heat were released from this sample of water, what is the mass of the sample?

mass = 25.03 g

Explanation:

Given data:

Initial temperature = 67.5°C

Final temperature = 25.2°C

Heat released = -4425 j

Mass of water = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 25.2°C - 67.5°C

ΔT = -42.3°C

Specific heat of water = 4.18 j/g.°C

Q = m.c. ΔT

-4425 j = m × 4.18 j/g.°C × -42.3°C

-4425 j = m × -176.81 j/g

m = -4425 j /  -176.81 j/g

m = 25.03 g

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.

b is the correct answer

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