Heat Transfer Concepts

This collection of flashcards covers key concepts and calculations related to sensible and latent heat, along with example problems from the lecture notes.

What is sensible heat?

Heat that changes the temperature of an object without changing its state.

What is latent heat?

Heat that changes the state of matter without changing the temperature.

What is the formula for calculating sensible heat?

Q = m.c.ΔT, where m is mass, c is specific heat capacity, and ΔT is the change in temperature.

What is the formula for calculating latent heat?

Q = m.L, where m is mass and L is the latent heat.

How much heat is needed to transform 100g of water at 20ºC into vapor at 110ºC?

This requires calculating both sensible and latent heat using given values.

How much heat is needed to transform 500g of ice at -20ºC into water at 50ºC?

Use cice, cwater, Lmelting, and heating formulas to calculate.

What happens when an ice cube at -5ºC is placed in water at 25ºC?

The water temperature drops to 10ºC and the ice cube melts completely.

When a 100g cube of aluminum is dropped into 2 liters of water at 20ºC, what is being determined?

The final temperature of the water and aluminum assuming negligible heat loss.

How much heat is needed to change 2 kg of ice at -50ºC into steam at 150ºC?

Calculate using specific heat values for ice and water, melting, and vaporization.

How much heat needs to be added to 100g of copper to just melt it starting at 20ºC?

Calculate using the specific heat of copper and the latent heat of fusion.