Which of the following is described by the equation [tex]H _2 O (s)[/tex] + heat [tex]\rightarrow H _2 O (\Lambda)[/tex] ?
A. Evaporating
B. Freezing
C. Condensing
D. Melting
Answer (2)
The equation describes solid water absorbing heat.
This process transforms solid water into liquid water.
The phase change from solid to liquid is called melting.
Therefore, the correct answer is melting: D .
Explanation
Understanding the Equation The equation H 2 O ( s ) + heat → H 2 O ( Λ ) describes a process where solid water ( H 2 O ( s ) ) absorbs heat and transforms into H 2 O ( Λ ) . We need to identify what H 2 O ( Λ ) represents and which of the given options matches this process.
Identifying the Initial State H 2 O ( s ) represents solid water, which is ice. The equation shows that ice absorbs heat.
Inferring the Final State The symbol Λ is not a standard notation for phases of matter. However, given the context of the problem and the options provided, we can infer that it likely represents liquid water, H 2 O ( l ) .
Identifying the Phase Change The process of solid water (ice) absorbing heat and transforming into liquid water is called melting.
Conclusion Therefore, the equation describes melting.
Examples
Melting is a common phenomenon we observe in everyday life. For example, when you leave an ice cube out of the freezer, it absorbs heat from the surroundings and melts into liquid water. This process is crucial in many natural phenomena, such as the melting of glaciers and snow, which contributes to water resources. Understanding phase transitions like melting helps us predict and manage water availability and climate change impacts.
The equation describes melting, as it shows solid water (ice) absorbing heat and transforming into liquid water. Therefore, the correct answer is option D: Melting. This understanding of phase changes is crucial in various natural and everyday phenomena.
;
