Thermal Processes and Temperature Concepts

The video tutorial covers the concept of heat as a form of energy, its units, and the relationship between different units. It explains temperature, its measurement, and the various scales used, including Celsius, Fahrenheit, and Kelvin. The effects of heat on bodies, such as changes in temperature, size, and state, are discussed. The video also explores the processes of melting, freezing, vaporization, and condensation, and compares boiling and evaporation.

What is the SI unit of heat?

• Fahrenheit

• Kelvin

• Joule

• Calorie

How many joules are approximately equal to one calorie?

• 4.2

• 0.24

• 1000

• 1

Which device is used to measure temperature?

• Barometer

• Hygrometer

• Anemometer

• Thermometer

What is the ice point on the Celsius scale?

• 100°C

• 32°C

• 273°C

• 0°C

Which temperature scale has no negative values?

• Celsius

• Fahrenheit

• Kelvin

• Rankine

What happens to a body when it is heated?

• It remains the same

• It changes color

• It expands

• It contracts

What is the process called when a solid changes directly into vapor?

• Condensation

• Sublimation

• Freezing

• Melting

Which process occurs at a fixed temperature: boiling or evaporation?

• Neither

• Both

• Evaporation

• Boiling

Which process is generally faster: boiling or evaporation?

• Boiling

• Evaporation

• Both are the same

• Depends on the substance

What is the main difference between boiling and evaporation?

• Evaporation requires a fixed temperature

• Evaporation is a rapid process

• Boiling occurs at all temperatures

• Boiling requires a fixed temperature