Heat, Internal Energy, and Specific Heat

Distinguish between temperature, heat, and internal energy, and practice calorie, Btu, and specific heat calculations.

download Export
search_insights Statistics
stylus_note White Board
Quran
calculate Calculator
dictionary Dictionary
fullscreen Full Screen
QUESTION OF

volume_mute Read quiz aloud
Views #: 138
Questions #: 10
Time: 20 minutes
Pass Score: 80.0%
Style
Mode

Comparing Average Kinetic Energy

1 pts
volume_mute

Which molecules have greater average kinetic energy: those in a cup of water at 20°C, or those in a cup of water at 20°F?

note_alt Add notes
flag Flag
volume_mute

Correct Answer

Explanation


Match the Term to Its Definition

2 pts
volume_mute
To complete the line match
  1. Click on an item in the first group
  2. Click on an item in the second group
  3. To delete a match, double click on a line

Term

Temperature
Heat
Internal Energy

What It Measures

Average kinetic energy of molecules
Energy transferred due to a temperature difference
Total kinetic and potential energy of all molecules

Match each term on the left with what it actually measures on the right.

note_alt Add notes
flag Flag
volume_mute

Correct Answer

Explanation


Temperature Rise From Added Calories

1 pts
volume_mute

One calorie raises the temperature of 1 gram of water by 1 Celsius degree. Suppose you have 15 grams of water and add 60 calories to it. How much does its temperature rise (in Celsius degrees)?

note_alt Add notes
flag Flag
volume_mute

Correct Answer

Explanation


Heat Needed to Raise Water's Temperature

2 pts
volume_mute

How much heat, in calories, must be added to raise 100 grams of water from 5°C to 95°C?

note_alt Add notes
flag Flag
volume_mute

Correct Answer

Explanation


British Thermal Units for Water

1 pts
volume_mute

One Btu raises the temperature of 1 pound of water by 1 Fahrenheit degree. How many Btu's are required to raise the temperature of 5 pounds of water by 10 Fahrenheit degrees?

note_alt Add notes
flag Flag
volume_mute

Correct Answer

Explanation


Interpreting an Air Conditioner Rating

1 pts
volume_mute
Missing
A cooling device rated at 12,000 Btu's actually means it can exchange 12,000 Btu's of heat energy every ______, not once before it "expires."
note_alt Add notes
flag Flag
volume_mute

Correct Answer

Explanation


Fill In the Heat Calculation for Copper

2 pts
volume_mute

Using \(H = m \cdot c \cdot \Delta T\), find the heat needed to raise 100 grams of copper (specific heat = 0.09) by 5 Celsius degrees:

\(H = 100 \cdot 0.09 \cdot\) (1) = (2) cal

Please drag and drop the selected option in the right place or type it instead
5
45
note_alt Add notes
flag Flag
volume_mute

Correct Answer

Explanation


Order Materials by Specific Heat

3 pts
volume_mute
Please drag and drop the options to sort them
Arrange these materials in order from the lowest specific heat to the highest.
Copper
Glycerin
Aluminum
Water
Iron
Silver
note_alt Add notes
flag Flag
volume_mute

Correct Answer

Explanation


Classify Materials by Specific Heat

3 pts
volume_mute
Examples
×Water (1.00)
×Silver (0.06)
×Glass (0.16)
×Aluminum (0.22)
×Glycerin (0.60)
×Iron (0.11)
×Ice (0.50)
×Copper (0.09)
Specific Heat < 0.5
Specific Heat ≥ 0.5

Sort each material by whether its specific heat is below or at/above 0.5

note_alt Add notes
flag Flag
volume_mute

Correct Answer

Explanation


Final Temperature of Heated Glass

2 pts
volume_mute

If 120 calories of heat are added to 100 grams of glass (specific heat = 0.16) starting at 15°C, what will be the final temperature of the glass, in °C?

note_alt Add notes
flag Flag
volume_mute

Correct Answer

Explanation