Practice Questions 9/2 or 9/3

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs heat from its surroundings, resulting in a decrease in temperature.

Front

What is an exothermic reaction?

Back

An exothermic reaction is a chemical reaction that releases heat to its surroundings, resulting in an increase in temperature.

Front

What does the line segment A-B represent in a phase diagram?

Back

The line segment A-B represents the solid state of a substance.

Front

What is the boiling point in a phase diagram?

Back

The boiling point is the temperature at which a substance transitions from the liquid phase to the gas phase, typically represented between the line segments D and E.

Front

What is the atomic mass of Cobalt?

Back

The atomic mass of Cobalt is 58.933 g/mol.

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is a phase diagram?

Back

A phase diagram is a graphical representation that shows the states of a substance at various temperatures and pressures.

Front

What is the definition of temperature in a scientific context?

Back

Temperature is a measure of the average kinetic energy of the particles in a substance.

Front

What is the role of heat in chemical reactions?

Back

Heat can either be absorbed or released during chemical reactions, influencing the reaction's temperature and energy changes.