Calculating Heat in Phase Changes

Calculating Heat in Phase Changes

Assessment

Interactive Video

Chemistry, Physics, Science

9th - 12th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial explains heating curves, which depict the changes in states of matter as a substance is heated. It covers how to calculate the heat required for temperature changes using the specific heat equation and for phase changes using the heat of fusion and vaporization. The tutorial also demonstrates how to combine these calculations for scenarios involving both temperature and phase changes.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does a slanted line on a heating curve represent?

A phase change

A single state of matter being heated

A cooling process

A constant temperature

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the specific heat equation used for?

Calculating the heat required for a phase change

Determining the boiling point of a substance

Calculating the heat required to change the temperature of a substance

Measuring the mass of a substance

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which equation is used when a substance is undergoing a phase change?

Q = M C delta T

Q = M C P

Q = Delta H times T

Q = M times Delta H

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the heat of fusion?

The heat required to boil a substance

The heat required to melt a substance

The heat required to freeze a substance

The heat required to condense a substance

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the heat of vaporization refer to?

The heat required to freeze a substance

The heat required to boil a substance

The heat required to melt a substance

The heat required to condense a substance

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How much heat is required to melt 50 grams of iron at its melting point if the heat of fusion is 246 joules per gram?

24,600 joules

50,000 joules

12,300 joules

6,150 joules

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a heating curve, what does a flat line indicate?

A phase change

An increase in temperature

A constant temperature

A decrease in temperature

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