Heating Curve and Phase Changes

The video tutorial discusses phase changes, focusing on the heating curve of ice. It covers the process of heating a slab of ice from -40°C to 140°C, explaining the changes in temperature and state at key points: melting at 0°C and boiling at 100°C. The tutorial details the heat absorbed during these processes, using equations for specific heat capacity and latent heat. The video concludes with a guide to plotting the heating curve graph.

What is the initial temperature of the ice in the heating curve discussed?

• 0°C

• -40°C

• -20°C

• 100°C

During the heating of ice from -40°C to 0°C, which formula is used to calculate the heat absorbed?

• Q = mL

• Q = mcΔT

• Q = PΔV

• Q = mgh

What happens to the temperature of ice during the melting process at 0°C?

• It remains constant

• It decreases

• It fluctuates

• It increases

What is the term used for the heat absorbed during the melting of ice?

• Thermal conductivity

• Latent heat of vaporization

• Latent heat of fusion

• Specific heat

At what temperature does water start boiling in the discussed heating curve?

• 0°C

• 50°C

• 140°C

• 100°C

What is the process called when water turns into steam at 100°C?

• Boiling

• Condensation

• Melting

• Freezing

What remains constant during the boiling process of water at 100°C?

• Temperature

• Pressure

• Mass

• Volume

What is the term for the heat absorbed during the boiling of water?

• Latent heat of vaporization

• Thermal conductivity

• Latent heat of fusion

• Specific heat

Which formula is used to calculate the heat absorbed when steam is heated from 100°C to 140°C?

• Q = PΔV

• Q = mgh

• Q = mcΔT

• Q = mL

What is the final temperature of the steam in the heating curve?

• 100°C

• 120°C

• 160°C

• 140°C