Understanding Energy Transfer and Specific Heat Capacity

The video tutorial explores the concept of energy transfer in heating water, focusing on specific heat capacity. It explains how to calculate the energy required to heat water using the formula ΔE = mcΔθ, where ΔE is the change in thermal energy, m is mass, c is specific heat capacity, and Δθ is the temperature change. The tutorial also demonstrates how to estimate the power of a kettle and compares the specific heat capacities of water and oil, highlighting how different materials heat up at different rates.

What are the three factors that affect the amount of energy transferred when heating water?

• Heating time, specific heat capacity, and type of container

• Rise in temperature, type of container, and heating time

• Amount of water, type of container, and specific heat capacity

• Amount of water, rise in temperature, and specific heat capacity

What is the specific heat capacity of water?

• 1.97 kilojoules per kilogram per degree Celsius

• 3.18 kilojoules per kilogram per degree Celsius

• 4.18 kilojoules per kilogram per degree Celsius

• 2.18 kilojoules per kilogram per degree Celsius

How much energy is needed to heat 0.5 kilograms of water from 18°C to 100°C?

• 171.38 kilojoules

• 200 kilojoules

• 150 kilojoules

• 180 kilojoules

If a kettle takes 80 seconds to boil, what is the estimated power of the kettle?

• 2.14 kilowatts

• 4.14 kilowatts

• 1.14 kilowatts

• 3.14 kilowatts

What is the specific heat capacity of olive oil?

• 1.97 kilojoules per kilogram per degree Celsius

• 3.97 kilojoules per kilogram per degree Celsius

• 4.18 kilojoules per kilogram per degree Celsius

• 2.97 kilojoules per kilogram per degree Celsius

Why does oil heat up faster than water when exposed to the same heat source?

• Oil is less dense than water

• Oil is denser than water

• Oil has a lower specific heat capacity

• Oil has a higher specific heat capacity

What temperature rise would you get for water if 40 kilojoules of energy is transferred to 1 kilogram of it?

• 7.5 degrees Celsius

• 9.5 degrees Celsius

• 10.5 degrees Celsius

• 8.5 degrees Celsius

What temperature rise would you get for olive oil if 40 kilojoules of energy is transferred to 1 kilogram of it?

• 22.3 degrees Celsius

• 20.3 degrees Celsius

• 18.3 degrees Celsius

• 15.3 degrees Celsius

How does the specific heat capacity of metals change with atomic mass?

• Remains constant regardless of atomic mass

• Decreases as atomic mass increases

• Varies unpredictably with atomic mass

• Increases as atomic mass increases

What is a common characteristic of materials made up of lighter elements in terms of specific heat capacity?

• They have a higher specific heat capacity

• Their specific heat capacity is unpredictable

• They have a lower specific heat capacity

• Their specific heat capacity is the same as metals