QQuestionAnatomy and Physiology
QuestionAnatomy and Physiology
Which of the following changes are chemical changes?
$\square$ Gasoline is evaporated.
$\square$ Water is heated up.
$\square$ Water is frozen.
$\square$ Gasoline is burned.
$\square$ Water is boiled.
Attachments
6 months agoReport content
Answer
Full Solution Locked
Sign in to view the complete step-by-step solution and unlock all study resources.
Step 1: Identify the state changes that involve a change in the physical state of the substance.
State changes, such as evaporation, heating, and freezing, are physical changes because they do not result in the formation of new substances. However, burning and boiling can be either physical or chemical changes depending on the context. In this case, we need to look at the specific substances involved.
Step 2: Analyze the state changes that involve gasoline.
Gasoline is a hydrocarbon, a type of compound that consists of only hydrogen and carbon atoms. When gasoline is burned, it reacts with oxygen from the air to produce carbon dioxide and water, releasing energy in the form of heat and light. This is a chemical change because a new substance is formed.
Final Answer
The chemical change is "Gasoline is burned."
Need Help with Homework?
Stuck on a difficult problem? We've got you covered:
- Post your question or upload an image
- Get instant step-by-step solutions
- Learn from our AI and community of students