Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

            Q  =  3.06 kJ

Solution:

The equation used for this problem is as follow,

                                                 Q  =  m Cp ΔT   (1)

Where;

           Q  =  Heat  =  ?

           m  =  mass  =  125 g

           Cp  =  Specific Heat Capacity  =  0.450 J.g⁻¹.°C⁻¹

           ΔT  =  Change in Temperature  =  78.0 °C - 23.5 °C  =  54.5 °C

Putting values in eq. 1,

                            Q  =  125 g × 0.450 J.g⁻¹.°C⁻¹ ×  54.5 °C

                            Q  =  3065 J

Or,

                            Q  =  3.06 kJ

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.

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

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