How many calories are needed to change the temperature of 1 g of water by 1^∘ C ? To melt 1 g of

step 1 The specific heat capacity of water is 1 calorie per gram per degree Celsius. The latent heat of

How many calories are needed to change the temperature of 1...

How many calories are needed to change the temperature of 1 $\mathrm{g}$ of water by $1^{\circ} \mathrm{C}$ ? To melt 1 $\mathrm{g}$ of ice at $0^{\circ} \mathrm{C}$ ? To
vaporize 1 $\mathrm{g}$ of boiling water at $100^{\circ} \mathrm{C}$ ?

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Key Concepts

Latent Heat of Vaporization

The latent heat of vaporization is the energy required to transform a substance from liquid to gas at its boiling point, while the temperature remains constant. In the case of water, this concept addresses the energy needed to vaporize boiling water at 100°C. This property is pivotal in studies involving phase changes, energy balance, and processes like evaporation, which significantly affect atmospheric and thermal dynamics.

Specific Heat Capacity

Specific heat capacity is the amount of energy required to raise the temperature of a unit mass of a substance by one degree Celsius. In the context of water, it is frequently used as a reference point in calorie measurements, where one calorie is defined as the energy needed to raise 1 gram of water by 1°C. This concept is central to thermodynamics and energy transfer studies in physics and chemistry.

Latent Heat of Fusion

The latent heat of fusion refers to the amount of energy required to change a substance from solid to liquid at its melting point, without a change in temperature. For water, this concept explains the energy needed to melt ice at 0°C. Understanding latent heat is essential in various fields such as meteorology, climate science, and engineering, as it plays a critical role in phase transitions.

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