Question 1

Which of the following is NOT a characteristic of the solid state?

Accepted Answer

Particles are moving very fast

Question 2

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

Accepted Answer

Grinding coffee beans

Question 3

Which of the following would NOT be a physical change?

Accepted Answer

Burning gasoline in a lawnmower

Question 4

Which of the following is a chemical change?

Accepted Answer

Burning sugar

Question 5

Which of the following is a physical change?

Accepted Answer

Solid dry ice changing to a gas

Question 6

Which one of the following properties describes a liquid?

Accepted Answer

Particles are close together and move randomly

Question 7

In which of the following would the particles move most rapidly?

Accepted Answer

Steam at 110 \ ^\circ \mathrm{C}

Question 8

If the temperature is $$-55\ ^\circ \mathrm{F}$$, what is the corresponding temperature on the Kelvin scale?

Accepted Answer

$$225\ \mathrm{K}$$

Question 9

The energy stored in molecules is ________.

Accepted Answer

Potential energy

Question 10

The energy of motion is referred to as ________.

Accepted Answer

Kinetic energy

Question 11

A potato contains $$20\ \mathrm{g} of $$carbohydrate. If carbohydrate has a caloric value of $$4\ \mathrm{kcal/g}$$, how many kcal are obtained from the carbohydrate in the potato?

Accepted Answer

$$40\ \mathrm{kcal}$$

Question 12

One cup of kidney beans contains $$15\ \mathrm{g} of $$protein, $$1\ \mathrm{g} of $$fat, and $$42\ \mathrm{g} of $$carbohydrate. How many kilocalories, to two significant figures, does this sample contain? (The caloric values are: $$4\ \mathrm{kcal/g}$$ for carbohydrate, $$9\ \mathrm{kcal/g}$$ for fat, and $$4\ \mathrm{kcal/g}$$ for protein.)

Accepted Answer

$$250\ \mathrm{kcal}$$

Question 13

The formation of a gas resulting from the escape of high-energy particles from the surface of a liquid is known as ________.

Accepted Answer

Vaporization

Question 14

When a solid is converted directly to a gas, the change of state is called ________.

Accepted Answer

Sublimation

Question 15

Which of the following best describes the process of condensation?

Accepted Answer

A gas changes to a liquid

Question 16

A sample of water is heated from $$25\ ^\circ \mathrm{C} to$$ $$100\ ^\circ \mathrm{C}. $$Which of the following statements is true?

Accepted Answer

The kinetic energy of the water molecules increases

Question 17

Which of the following is an example of sublimation in everyday life?

Accepted Answer

Dry ice disappearing without leaving a liquid

Question 18

Which of the following statements about gases is correct?

Accepted Answer

Gas particles are far apart and move rapidly

Question 19

A student places $$100\ \mathrm{g} of $$ice at $$0\ ^\circ \mathrm{C}$$ into $$200\ \mathrm{g} of $$water at $$50\ ^\circ \mathrm{C}. $$Assuming no heat is lost to the surroundings, what is the final temperature after all the ice melts? (Specific heat of water $$= 4.18\ \mathrm{J/g\cdot ^\circ C}$$, heat of fusion of ice $$= 334\ \mathrm{J/g})$$

Accepted Answer

$$20\ ^\circ \mathrm{C}$$

Question 20

Which of the following best explains why sweating cools the body?

Accepted Answer

Sweat absorbs heat from the body as it evaporates

Chap 3

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드