1. Calculate the amount of energy absorbed when 10 g water at 86 C turns completely to steam vapor at 100C 2. Calculate the amount of energy released when 10 g water at 72 C freezes completely at 0C

The amount of energy absorbed when 10 g water at 86 C turns completely to steam vapor at 100 C is 584.76 J

The amount of energy released when 10 g water at 72 C freezes completely at 0 C is 3,012.48 J

Explanation:

Sensible heat is the amount of heat that a body can receive without affecting its molecular structure. If the molecular structure does not change, the state (solid, liquid, gas) does not change. Since the molecular structure does not change, a change in temperature is observed.

In other words, the heat that produces a change in the temperature of a substance without any changes in its physical state (phase change) is called sensible heat.

The equation that allows calculating this type of heat exchange is:

Q = c * m * ΔT

where Q is the heat exchanged by a body of mass m, constituted by a substance of specific heat c and where ΔT is the change in temperature.

1. In this case, you know:

Replacing:

Q= 4.184 *10 g*14 C

Solving:

Q= 584.76 J

The amount of energy absorbed when 10 g water at 86 C turns completely to steam vapor at 100 C is 584.76 J

2. In this case, you know:

Replacing:

Q= 4.184 *10 g*(-72) C

Solving:

Q= -3,012.48 J

The amount of energy released when 10 g water at 72 C freezes completely at 0 C is 3,012.48 J

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