Questions: Question 7 2 pts Which is an example of a physical change? the melting of snow the digestion of food the rusting of an iron nail the cooking of an egg the burning of butane in a lighter

Question 7 2 pts Which is an example of a physical change? the melting of snow the digestion of food the rusting of an iron nail the cooking of an egg the burning of butane in a lighter
Transcript text: Question 7 2 pts Which is an example of a physical change? the melting of snow the digestion of food the rusting of an iron nail the cooking of an egg the burning of butane in a lighter
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Solution

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Solution Steps

Step 1: Understanding Physical vs. Chemical Changes

A physical change involves a change in the state or appearance of a substance without altering its chemical composition. In contrast, a chemical change results in the formation of one or more new substances with different chemical properties.

Step 2: Analyzing Each Option
  • The melting of snow: This is a physical change because it involves a change of state from solid (snow) to liquid (water) without changing the chemical composition of H\(_2\)O.
  • The digestion of food: This is a chemical change because it involves breaking down food into different substances through chemical reactions.
  • The rusting of an iron nail: This is a chemical change because it involves iron reacting with oxygen to form iron oxide, a new substance.
  • The cooking of an egg: This is a chemical change because it involves the denaturation of proteins, forming new substances.
  • The burning of butane in a lighter: This is a chemical change because it involves a combustion reaction, producing new substances like carbon dioxide and water.

Final Answer

The example of a physical change is the melting of snow.

\(\boxed{\text{The melting of snow}}\)

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