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Which of the following processes requires energy?Question 6Select one:Steam condenses inside the lid on a saucepan of boiling water.The melted wax hardens after a candle is extinguished.Water vapor forms ice crystals in the upper atmosphere.Gasoline spilled on the ground evaporates very quickly.Water condenses on the outside of a cold soda can.

Question

Which of the following processes requires energy?Question 6Select one:Steam condenses inside the lid on a saucepan of boiling water.The melted wax hardens after a candle is extinguished.Water vapor forms ice crystals in the upper atmosphere.Gasoline spilled on the ground evaporates very quickly.Water condenses on the outside of a cold soda can.

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Solution

The process that requires energy among the options given is "Gasoline spilled on the ground evaporates very quickly."

Here's why:

  1. Steam condenses inside the lid on a saucepan of boiling water: This is a cooling process, where steam (which is water in gas form) loses energy to the environment and condenses back into liquid water. No energy is required for this process; instead, energy is released.

  2. The melted wax hardens after a candle is extinguished: This is a solidification process. When the candle is extinguished, the melted wax loses heat to the environment and solidifies. This process also releases energy, rather than requiring it.

  3. Water vapor forms ice crystals in the upper atmosphere: This is a process of deposition, where water vapor changes directly into ice without becoming a liquid first. This process also releases energy.

  4. Gasoline spilled on the ground evaporates very quickly: This is a process of evaporation, where the gasoline changes from a liquid to a gas. This process requires energy because the gasoline molecules need to gain energy to change from a liquid state to a gas state.

  5. Water condenses on the outside of a cold soda can: This is a process of condensation, where water in the air loses energy and changes from a gas to a liquid. This process releases energy, rather than requiring it.

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