Exploring Exothermic and Endothermic Reactions

The video tutorial covers advanced topics in chemical reactions and energy transfers. It begins with an overview of neutralization reactions and the differences between dilute and concentrated acids and alkalis. The tutorial then explains exothermic and endothermic reactions, using energy level diagrams to illustrate how energy is released or absorbed during chemical reactions. It also includes practical examples, such as the reaction of magnesium with hydrochloric acid and the burning of methane. The video concludes with higher-tier calculations of bond energies in chemical reactions.

What is the product of a neutralization reaction between an acid and an alkali?

• Water and carbon dioxide

• Hydrogen and oxygen

• Salt and hydrogen

• Salt and water

Which of the following is a measure of the amount of water added to an acid or alkali?

• Ionization

• Dilution

• Concentration

• Strength

What ions do acids produce when added to water?

• Hydrogen ions (H+)

• Chloride ions (Cl-)

• Hydroxide ions (OH-)

• Sodium ions (Na+)

What type of reaction releases energy when chemical bonds are formed?

• Endothermic

• Combustion

• Exothermic

• Neutralization

Tags

NGSS.HS-PS1-4

In an exothermic reaction, what happens to the energy of the products compared to the reactants?

• Products have more energy

• Products have less energy

• Energy remains the same

• Energy is absorbed

Tags

NGSS.HS-PS1-4

What is the term for the energy required to start a chemical reaction?

• Activation energy

• Bond energy

• Thermal energy

• Kinetic energy

What happens to the temperature of the surroundings during an endothermic reaction?

• It decreases

• It increases

• It remains the same

• It fluctuates

Tags

NGSS.HS-PS1-4

Which of the following reactions absorbs heat from the surroundings?

• Exothermic

• Neutralization

• Combustion

• Endothermic

Tags

NGSS.HS-PS1-4

How much energy is needed to break all the bonds in the reactants methane and oxygen?

• 1740 kJ

• 3466 kJ

• 996 kJ

• 2736 kJ

Tags

NGSS.HS-PS1-4

What is the excess energy released in the reaction of methane burning in oxygen?

• 3466 kJ

• 996 kJ

• 1740 kJ

• 730 kJ

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1