Gallium is a metal that has a melting point of 30°C. What change of state occurs if you hold it in a warm hand?evaporatingmeltingcondensingfreezing
Question
Gallium is a metal that has a melting point of 30°C. What change of state occurs if you hold it in a warm hand?
- evaporating
- melting
- condensing
- freezing
Solution
Identify the Change of State
When you hold gallium, which has a melting point of 30°C, in a warm hand, the temperature of the gallium increases due to the heat from your hand.
Determine the Initial State
At temperatures below 30°C, gallium is in a solid state.
Heat Transfer
Since your hand is warm, it transfers heat to the gallium, raising its temperature above its melting point.
Identify the Final State
As gallium reaches temperatures above 30°C, it transitions from solid to liquid state.
Conclusion
The change of state that occurs when you hold gallium in a warm hand is melting. This is because it transforms from a solid to a liquid upon absorbing heat.
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