In everyday life, we use heat energy for every one of our doings. Students need to understand the depth of it. The notes make it easier as it is in a simple language for every student to understand
HEAT ENERGY
The energy that is transferred between two substances at different temperatures is called Heat
energy. Energy flows from higher to lower point, so also Heat. It is measured in units of energy,
usually calories or joules.
Also, heat energy is a result of the movement of small particles called atoms, molecules, or ions
in solids, liquids, and gases. It can be transferred from one object to another object. The flow due
to the difference in temperature between the two objects is called heat. It is a form of energy that
is transferred between the system with different temperatures it can be to
as heat or thermal energy.
Heat is typically measured in Btu, calories, or joules.
Thermal energy (also called heat energy) happens when there is an increase in temperature
making atoms and molecules move faster and bang with each other. The energy that comes from
the temperature of the heated substance is called thermal energy.
WHAT IS HEAT AND ITS EFFECT?
When there is an increment in molecular movement, a substance is heated,
Due to this, the average distance between the molecules also increases, thereby increasing the
quantity of the entity, i.e., expanding the substance. However, the movement of molecules
depends upon the state of matter.
HOW ARE HEAT AND WORK RELATED?
Heat and work are two different ways of transferring energy from one system to another.
... Heat is the transfer of thermal energy between systems, while work is the transfer of
mechanical energy between two systems.
WHAT IS HEAT ENERGY AND IT’S USES?
By definition, heat is thermal energy transferred from one thing to another. And like other forms
of energy, heat can be used to perform work. It can warm things up, cool things down, generate
electricity, and be transmitted for use in different locations.
.
CHARACTERISTICS OF HEAT
Heat object contains thermal energy unlike other forms of energy the amount of
thermal energy is not dependent upon the amount of work an object perform Sas heat from the
earth is lost to space it is replaced by heat brought by the sun.
THE BENEFITS OF HEAT ENERGY
The advantages of heat, or geothermal energy, seem to be thus: The energy itself is
environmentally friendly due to the source – it's natural. It's renewable, much like wind or
gravity energy would be. It's cheaper than most other energy forms to make as well as being
more efficient at its job of heating things.
, IMPORTANCE OF HEAT
In physical science, heat is important to all aspects of life, especially plants, and mammals.
Plant life relies on heat, among other things, to survive as well. Heat is a result of energy, which
can be beneficial as well as dangerous.
WHY DO WE USE HEAT?
Heat is very important in our daily life in warming the house, cooking, heating the water, and
drying the washed clothes. Heat has many usages in the industry as making and processing food
and manufacturing the glass, paper, the textile et
THE BASIC EFFECTS OF HEAT
Prolonged exposure to extreme heat can cause heat exhaustion, heat cramps, heat stroke,
and death, as well as exacerbate preexisting chronic conditions, such as various respiratory,
cerebral, and cardiovascular diseases.
CAUSES OF HEAT ENERGY
Heat energy causes
MELTING,
FREEZING,
EVAPORATION, and
CONDENSATION.
WHICH HAS MORE HEAT ENERGY?
Hotter things have more heat energy than colder things. That's because the atoms or molecules
move around faster in hot things (red, right) than they do in cold things (blue, left). This
idea is called the kinetic theory.
WHAT HAPPENS WHEN THE OBJECTS ARE HEATED?
When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate
faster, the space between atoms increases. The motion and spacing of the particles determine the
state of matter of the substance. The result of increased molecular motion is that
the object expands and takes up more space.
THE TYPES OF HEAT ENERGY
The Three Mechanisms of Heat Transfer:
CONDUCTION
CONVECTION
RADIATION.
EVAPORATIVE COOLING
WHAT ARE THE DISADVANTAGES OF HEAT TRANSFER?
Leakage and pressure drops in the system are two possible disadvantages of heat exchangers.
Leakage in the process of heat transfer is difficult to prevent and repair. Many heat exchangers
need to be taken apart entirely to fix a leak.
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