Temperature and Heat Flashcards

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Questions and Answers

How can you check your calculation of the current temperature on a min/max thermometer?

Compare the readings at either end of the red line.

What happens to the values as you move up the left side of a min/max thermometer?

They decrease.

If the current temperature on the left side reads 4°C, what will the right side current temperature be?

4°C.

If 1 kg of iron and 1 kg of silver absorb equal amounts of heat, which will have a greater increase in temperature?

The temperature of the silver will increase by a greater amount. Signup and view all the answers

If two glasses of water are at the same temperature, what do you know about the kinetic energy of the particles in the glasses?

The kinetic energy of the particles in the two glasses of water is the same. Signup and view all the answers

What is the difference between thermal energy and heat?

Thermal energy is the total energy of all of the particles of a substance. Heat is the movement of thermal energy from a substance at a higher temperature to one at a lower temperature. Signup and view all the answers

What is thermal energy?

The total energy of all the particles in a substance. Signup and view all the answers

How does an increase in the total energy of the particles in a substance affect the thermal energy of the substance?

An increase in the total energy of the particles results in an increase in the thermal energy of the substance. Signup and view all the answers

Describe how a thermometer works.

A liquid, often mercury or alcohol, is sealed in a long, thin glass tube. As the liquid is heated, the particles speed up and spread out, causing the liquid to expand and rise. When the liquid cools, the particles come closer together, causing it to contract and flow down the tube. Signup and view all the answers

List the three different temperature scales.

Fahrenheit, Celsius, Kelvin. Signup and view all the answers

How do the units of the Celsius temperature scale compare to those of the Kelvin scale?

A one-degree change in temperature on the Celsius scale is equal to a one-unit change on the Kelvin scale. Signup and view all the answers

Which is a larger change in temperature: a change of 1 Celsius degree or 1 Fahrenheit degree? Explain.

A change in temperature of 1 Celsius degree is greater than a change of 1 Fahrenheit degree because a Celsius degree is larger than a Fahrenheit degree. Signup and view all the answers

If a bathtub and a cup contain water at the same temperature, which will have more thermal energy? Why?

The water in the bathtub has more thermal energy because it contains a greater number of water molecules. Signup and view all the answers

Study Notes

Temperature Measurement

To verify the current temperature on a min/max thermometer, compare values at either end of the red line.
As you ascend the left side of a min/max thermometer, the values decrease.
The current temperature read on the left side directly corresponds to the right side; if it reads 4°C on the left, it will also be 4°C on the right.

Specific Heat and Temperature Change

Iron's specific heat is higher than that of silver; therefore, when equal heat is absorbed by both, silver's temperature will increase more significantly.

Kinetic Energy in Water

If two glasses of water are at the same temperature, the kinetic energy of the particles in both is equal.

Thermal Energy vs. Heat

Thermal energy is defined as the total energy present in all particles of a substance.
Heat is the movement of thermal energy from an area of higher temperature to one of lower temperature; it represents energy transfer rather than energy itself.

Understanding Thermal Energy

The total energy of all particles within a substance is referred to as thermal energy.
An increase in the particles' total energy results in an increase in the substance's thermal energy.

Thermometer Functionality

Thermometers contain a liquid such as mercury or alcohol in a sealed tube.
As temperature increases, the liquid expands due to particle motion, causing it to rise in the tube; cooling causes contraction and a drop in the liquid level.

Temperature Scales

The three primary temperature scales are Fahrenheit, Celsius, and Kelvin.
A change of 1°C is equivalent to a change of 1 K, underscoring their direct relationship.

Temperature Change Comparison

A change of 1°C represents a larger temperature change than 1°F because there are 100 Celsius degrees between water's freezing and boiling points, compared to 180 Fahrenheit degrees.

Thermal Energy in Different Quantities

A bathtub filled with water at the same temperature as that in a teacup contains greater thermal energy due to the larger number of water molecules present.

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Description

Test your knowledge of temperature, thermal energy, and heat with these flashcards. Each card provides insights into thermometers and their functions, helping you understand the principles of measuring temperature effectively.