1. Intro to General Chemistry

A model shows water vapor turning directly into solid ice without passing through the liquid phase. Which change of state is represented in this model?

Stepping on a bag of potato chips would cause which type of change?

After a phase change from solid to liquid, how would you describe the appearance of the substance?

Which of the following best describes what happens when a solid melts?

Which of the following is an example of a chemical change?

Which of the following is NOT a physical change?

Which of the following is an example of a chemical change?

Which of the following methods can cause a substance to change from a solid to a liquid or from a liquid to a gas?

Which of the following is an example of a chemical change?

Which of the following best describes what happens during condensation?

Which of the following is NOT an example of a physical change?

Which of the following best describes what happens to the atoms in a liquid as it freezes?

Which of the following statements is true when a substance changes color during a process?

Which statement about the physical change of liquid water boiling into steam is true?

Which statement best describes the difference between a physical change and a chemical change?