Specific Heat Capacity in Everyday Examples

The video explains the concept of specific heat capacity, using analogies and practical examples. It covers the formula Q = c m ΔT, illustrating how different substances require varying amounts of energy to change temperature. Examples include water as a coolant in engines and its effect on climate. The video concludes with a calculation of energy needed to heat water and introduces latent heat as the next topic.

What determines which substance in a pizza will reach 200 degrees Celsius first?

• The type of oven used

• The color of the substance

• The specific heat capacity and amount of each substance

• The shape of the pizza

What is the formula for calculating the amount of energy required to change the temperature of a substance?

• Q = m + c + ΔT

• Q = m * ΔT / c

• Q = c / m * ΔT

• Q = c * m * ΔT

Which substance has a higher specific heat capacity, water or iron?

• It depends on the temperature

• Iron

• Water

• Both have the same

Why is water used as a coolant in engines?

• It is cheaper than other coolants

• It evaporates quickly

• It has a high specific heat capacity

• It is lighter than oil

How does the specific heat capacity of water affect coastal temperatures compared to inland areas?

• Coastal areas have more extreme temperatures

• Inland areas have more stable temperatures

• Inland areas are always cooler

• Coastal areas have less extreme temperatures

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

• 1670

• 5000

• 4182

• 450

What happens to the temperature of water in winter compared to the land?

• Water remains warmer than land

• Water becomes colder than land

• Water cools down faster than land

• Water and land cool at the same rate

In the example given, how much energy is required to heat 120 kg of water from 15 degrees to 61 degrees Celsius?

• 3.1 x 10^8 joules

• 2.3 x 10^7 joules

• 1.6 x 10^6 joules

• 4.2 x 10^5 joules

What is the change in temperature (ΔT) in the example where water is heated from 15 degrees to 61 degrees Celsius?

• 30 degrees

• 50 degrees

• 46 degrees

• 61 degrees

What concept will be discussed in the next video following this one?

• Thermal expansion

• Conduction

• Radiation

• Latent heat