1. Intro to General Chemistry

Which of the following observations would indicate that Pedro succeeded in creating a chemical change?

During a chemical change, what happens to the atoms in the substances involved?

When water changes from a liquid to a solid, how does the motion of its molecules change?

In an isolated system, is it possible for a change of physical state (such as melting or boiling) to occur?

Which statement best describes a physical change?

In the context of physical and chemical changes, when does a chemical transformation occur?

Which of the following best describes how a chemical change differs from a physical change?

Which of the following is NOT a likely indicator of a chemical change?

Which of the following is an example of objective information?

Which type of change occurs when liquid water evaporates and becomes water vapor?

As more and more energy is added to the atoms of a solid plastic, the plastic will first change into which state?

Which type of change occurs when ice melts?

Which of the following statements best describes the reversibility of chemical changes?

In physical changes, substances might change in ________ but not in ________.

Which term best describes the process that occurs when an egg cooks in a pan on the stove?