Q: Which of the following is the correct equation for specific heat capacity?

$$q = m \times c \times \Delta T$$

Question 1

Which of the following best defines matter?

Accepted Answer

Anything that has mass and occupies space.

Question 2

Which of the following is an example of a heterogeneous mixture?

Accepted Answer

Sand and iron filings

Question 3

Which statement correctly distinguishes an element from a compound?

Accepted Answer

An element is made of only one type of atom, while a compound contains two or more types of atoms chemically bonded.

Question 4

Which of the following is a physical property?

Accepted Answer

Melting point

Question 5

Which process represents a chemical change?

Accepted Answer

Burning wood in a campfire

Question 6

A sample of water is heated from $$20\ ^\circ\mathrm{C} to$$ $$80\ ^\circ\mathrm{C}. $$Which of the following best describes the energy change?

Accepted Answer

The water absorbs energy, which increases the kinetic energy of its molecules.

Question 7

Which of the following is the correct equation for specific heat capacity?

Accepted Answer

$$q = m 	imes c 	imes \Delta T$$

Question 8

Convert $$300.0\ \mathrm{K} to $$degrees Celsius. (Round to the correct number of significant figures.)

Accepted Answer

$$26.85\ ^\circ\mathrm{C}$$

Question 9

Which of the following best describes an exothermic reaction?

Accepted Answer

A reaction that releases energy to the surroundings.

Question 10

Which of the following is a pure substance?

Accepted Answer

Distilled water

Question 11

A student mixes $$50.0\ \mathrm{g} of $$water at $$20.0\ ^\circ\mathrm{C}$$ with $$50.0\ \mathrm{g} of $$water at $$80.0\ ^\circ\mathrm{C}. $$What is the final temperature, assuming no heat is lost to the surroundings? (Use $$c = 4.18\ \mathrm{J/g\ ^\circ C})$$

Accepted Answer

$$50.0\ ^\circ\mathrm{C}$$

Question 12

Which of the following is NOT a common unit of energy?

Accepted Answer

Kelvin ($$\mathrm{K})$$

Question 13

Which of the following best describes a homogeneous mixture?

Accepted Answer

A mixture with uniform composition throughout.

Question 14

Which of the following is a chemical property?

Accepted Answer

Ability to react with oxygen

Question 15

Which of the following statements about kinetic and potential energy is correct?

Accepted Answer

Kinetic energy is the energy of motion, while potential energy is stored energy due to position or composition.

Question 16

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

Accepted Answer

Evaporation of alcohol

Question 17

A reaction absorbs $$150.0\ \mathrm{J} of $$energy. What type of reaction is this?

Accepted Answer

Endothermic

Question 18

Which of the following best describes the relationship between temperature and particle motion?

Accepted Answer

As temperature increases, particle motion increases.

Question 19

Convert $$100.0\ ^\circ\mathrm{C} to $$Kelvin. (Round to the correct number of significant figures.)

Accepted Answer

$$373.15\ \mathrm{K}$$

Question 20

A $$25.0\ \mathrm{g}$$ sample of metal absorbs $$200.0\ \mathrm{J} of $$heat, causing its temperature to rise from $$20.0\ ^\circ\mathrm{C} to$$ $$40.0\ ^\circ\mathrm{C}. $$What is the specific heat capacity of the metal? (Round to the correct number of significant figures.)

Accepted Answer

$$0.400\ \mathrm{J/g\ ^\circ C}$$

Study Guide: Introduction to Chemistry – Chapter 3 Concepts Part 1

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