University:
Augusta University
Course:
CHEM 1441 | General Chemistry
Academic year:

2020
Views:

240

Pages:

4
Author:

Desmitis8w

Name Date Class CHAPTER 1 REVIEW Matter and Change SECTION 2 SHORT ANSWER Answer the following questions in the space provided. 1. Classify each of the following as a homogeneous or heterogeneous substance. heterogeneous a. iron ore homogeneous b. quartz heterogeneous c. granite homogeneous d. energy drink heterogeneous e. oil-and-vinegar salad dressing homogeneous f. salt homogeneous g. rainwater homogeneous h. nitrogen 2. Classify each of the following as a physical or chemical change. physical a. ice melting chemical b. paper burning chemical c. metal rusting physical d. gas pressure increasing physical e. liquid evaporating chemical f. food digesting 3. Compare a physical change with a chemical change. A chemical change involves a rearrangement of the atoms of different elements in a substance and the formation substances with different physical properties. A physical change can occur in properties such as the state or shape of a substance, but it will not affect the composition of that substance. Name Date Class SECTION 2 continued 4. Compare and contrast each of the following terms: a. mass and matter Mass is a measure of the amount of matter. Matter is anything that has mass and takes up space. b. atom and compound All matter is composed of atoms, which are the smallest units of an element that retain the properties of that element. Atoms can come together to form compounds. c. physical property and chemical property Physical properties are characteristics such as color, density, melting point, and boiling point that can be measured without changing the identity of the substance. Chemical properties relate to how a substance interacts with another substance to form a different substance. d. homogeneous mixture and heterogeneous mixture A homogeneous mixture has a uniform composition. A heterogeneous mixture is not uniform. 5. Using circles to represent particles, draw a diagram that compares the arrangement of particles in the solid, liquid, and gas states. Solid Liquid Gas 6. How is energy involved in chemical and physical changes? Energy is either absorbed or given off in all chemical and physical changes, but it is neither created nor destroyed. It simply assumes a different form, or it is moved from one place to another. CHAPTER 1 REVIEW Matter and Change SECTION 2 SHORT ANSWER Answer the following questions in the space provided. 1. Classify each of the following as a homogeneous or heterogeneous substance. a. iron ore b. quartz c. granite d. energy drink e. oil-and-vinegar salad dressing f. salt g. rainwater h. nitrogen 2. Classify each of the following as a physical or chemical change. a. ice melting b. paper burning c. metal rusting d. gas pressure increasing e. liquid evaporating f. food digesting 3. Compare a physical change with a chemical change. Name Date Class SECTION 2 continued 4. Compare and contrast each of the following terms: a. mass and matter b. atom and compound c. physical property and chemical property d. homogeneous mixture and heterogeneous mixture 5. Using circles to represent particles, draw a diagram that compares the arrangement of particles in the solid, liquid, and gas states. Solid Liquid 6. How is energy involved in chemical and physical changes? Gas