Changes in Phase & Latent Heat Video Lessons

Video Thumbnail

Concept

Problem: Suppose that in an insulated container, 0.100 kg of water at 20.0 °C is mixed with 1.500 kg of ice at −15.0 °C. You are asked to find the final temperature Tf of the system, but you are not told what the final phase of the system in equilibrium is.A. Find the amount of heat Qh it would take to bring all of the ice to its melting point, 0 °C. Express your answer in joules to three significant figures.B. Find the amount of heat Qc released in bringing all of the water to its freezing point, 0 °C. Your answer does not need to include a sign. Express your answer in joules to three significant figures.

FREE Expert Solution

Amount of heat required to  the t change temperature of a substance:

Q=mCT

A.

Tf = 0 °C + 273 = 273 K

Ti = -15.0 °C + 273 = 258 K

C = 2040J/kg•K

View Complete Written Solution
Problem Details

Suppose that in an insulated container, 0.100 kg of water at 20.0 °C is mixed with 1.500 kg of ice at −15.0 °C. You are asked to find the final temperature Tf of the system, but you are not told what the final phase of the system in equilibrium is.

A. Find the amount of heat Qh it would take to bring all of the ice to its melting point, 0 °C. Express your answer in joules to three significant figures.

B. Find the amount of heat Qc released in bringing all of the water to its freezing point, 0 °C. Your answer does not need to include a sign. Express your answer in joules to three significant figures.

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Changes in Phase & Latent Heat concept. You can view video lessons to learn Changes in Phase & Latent Heat. Or if you need more Changes in Phase & Latent Heat practice, you can also practice Changes in Phase & Latent Heat practice problems.