Which unit is used to express the amount of energy absorbed or released during a chemical reaction? (1) degree (2) torr (3) gram (4) joule

Which of the following is not a form of energy? (a) light (b) sound (c) air (d) electricity

Which of the following is NOT a form of energy? a. light b. oxygen c. heat d. electricity

What are the fixed reference points on the Celsius thermometer? (1) 32 and 100 (2) 0 and 212 (3) 32 and 212 (4) 0 and 100

Which property is a measure of the average kinetic energy of the particles in a sample of matter?

(1) mass

(2) temperature

(3) pressure

(4) density

As ice cools from 273 K to 263 K, the average kinetic energy of its molecules (1) decreases (2) increases (3) remains the same

Which term represents a form of energy? (1) heat (2) degree (3) kilojoule (4) temperature

Which kind of energy is stored in a chemical bond? (1) potential energy (2) kinetic energy (3) activation energy (4) ionization energy

The difference between the boiling point and the freezing point of pure water at standard pressure is (1) 32 K (2) 273 K (3) 100 K (4) 373 K

Which of the following cannot be decomposed by chemical means? (1) sodium, (2) ethanol, (3) sucrose, (4) water.

Explain gelatinization.

Which Is characteristic of all mixtures? (1) They are homogeneous. (2) They are heterogeneous. (3) Their compositions are in a definite ratio. (4) Their compositions may vary.

As NaCl(s) dissolves according to the equation NaCl(s) $\rightarrow$ Na+(aq) + $\mathrm{Cl}_{2}(a q)$, the entropy of the system (1) decreases (2) increases (3) remains the same

Which substance takes the shape of and fills the volume of any container into which it is placed? (1) $\mathrm{H}_{2} \mathrm{O}(\ell)$ (2) $\mathrm{CO}_{2}(g)$ (3) $I_{2}(s)$ (4) $\mathrm{Hg}(\ell)$