Exploring Energy Diagrams and Thermal Equilibrium

What is the date of the AP Chemistry exam for this year?

• May 14th

• May 12th

• May 16th

• May 10th

Which of the following best describes an endothermic process?

• Energy is released in the form of light.

• Energy is neither absorbed nor released.

• Energy is transferred from the surroundings to the system.

• Energy is transferred from the system to the surroundings.

Tags

NGSS.HS-PS1-4

In an exothermic reaction, what happens to the energy?

• It is absorbed by the system.

• It is released to the surroundings.

• It remains constant.

• It is converted into mass.

Tags

NGSS.HS-PS1-4

What is the primary focus of enthalpy in chemistry?

• Change in volume

• Heat transfer at constant pressure

• Change in mass

• Work done on the system

Tags

NGSS.HS-PS3-4

What is the final temperature of both the copper and the water in the classic thermochemistry experiment?

• 100 degrees Celsius

• 50 degrees Celsius

• 23.6 degrees Celsius

• 20 degrees Celsius

Tags

NGSS.HS-PS3-4

According to the first law of thermodynamics, if no heat is lost to the surroundings, what can be said about the heat lost by copper and the heat gained by water?

• The heat lost by copper is equal to the heat gained by water.

• The heat lost by copper is unrelated to the heat gained by water.

• The heat lost by copper is more than the heat gained by water.

• The heat lost by copper is less than the heat gained by water.

Tags

NGSS.HS-PS3-4

What is the specific heat capacity of water in joules per gram degree Celsius?

• 4.18

• 8.18

• 2.18

• 6.18

Tags

NGSS.HS-PS3-4

Which substance will reach a higher final temperature when absorbing the same amount of heat, given the same mass and initial temperature?

• It depends on the initial temperature

• Both will reach the same final temperature

• Copper

• Water

Tags

NGSS.HS-PS3-4

What is the enthalpy of fusion?

• The energy required to vaporize a liquid into a gas

• The energy required to melt a solid into a liquid

• The energy required to raise the temperature of a solid

• The energy required to cool a liquid into a solid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Why does the enthalpy of vaporization for water require more energy than for methane?

• Water has stronger intermolecular forces, including hydrogen bonds, compared to methane.

• Methane has stronger hydrogen bonds than water.

• Water has weaker intermolecular forces than methane.

• Methane is a polar molecule, requiring more energy to vaporize.