Heating Curve and Phase Changes

The video tutorial explains the heating curve of ice, focusing on the phases of melting and boiling. It describes how ice is heated at a constant rate, showing the temperature changes over time. The melting process (AB) involves the transition from solid to liquid at 0°C, requiring latent heat of fusion. The boiling process (CD) involves the transition from liquid to gas at 100°C, requiring latent heat of vaporization. The video concludes with a summary and directs viewers to additional resources.

What is represented on the y-axis of the heating curve graph?

• Volume

• Pressure

• Temperature

• Time

During the segment AB of the heating curve, what phase change occurs?

• Freezing

• Melting

• Condensation

• Boiling

At what temperature does ice melt into water according to the heating curve?

• 0°C

• 100°C

• 50°C

• 25°C

What is the formula used to calculate the heat required for melting ice?

• Q = nRT

• Q = PΔV

• Q = mL

• Q = mcΔT

What does the latent heat of fusion refer to?

• Heat required to change liquid to solid

• Heat required to change liquid to gas

• Heat required to change solid to liquid

• Heat required to change gas to liquid

During the segment CD of the heating curve, what phase change occurs?

• Melting

• Boiling

• Freezing

• Condensation

At what temperature does water boil into steam according to the heating curve?

• 25°C

• 100°C

• 50°C

• 0°C

What is the formula used to calculate the heat supplied for boiling water?

• Q = nRT

• Q = PΔV

• Q = mL

• Q = mcΔT

What does the latent heat of vaporization refer to?

• Heat required to change liquid to solid

• Heat required to change solid to liquid

• Heat required to change liquid to gas

• Heat required to change gas to liquid

What remains constant during the phase changes in the heating curve?

• Temperature

• Pressure

• Volume

• Time