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Heat Energy

What is heat energy?

Heat energy is the form of energy that can be transferred from a higher temperature body to a lower temperature. One object with a higher temperature loses it and others gain it. For example, heat flow increases the temperature of the colder body and decreases the temperature of the hotter body.

All the other forms of energy are completely converted into work but it can not be wholly converted into work. Any attempt to convert the whole quantity would affect a permanent change in the system.

For example, a substance absorbed energy without increasing temperature changing the physical state or phase (solid, liquid, gas, or vapor) of the system by melting, sublimation, and boiling. In this category, we discuss different topics and formulas related to heat energy.

Activation energy diagram of enzyme in enzyme catalysis reaction

Activation Energy

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Calculation, definition and measure formula of free energy

Free Energy

What is free energy in chemistry? Free energy in chemistry is a thermodynamics energy function that is used in various physical or chemical studies and...
Entropy change definition, formula and equation in thermodynamics to calculate entropy of universe in chemistry


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1st law of thermodynamics and conservation of energy, heat change and internal energy

Conservation of Energy Principle

Law of conservation of energy Law of Conservation of energy or conservation of energy principle in thermodynamics states that the total heat or energy of...
Specific and molar Heat capacity of gas or gases from energy equation

Heat Capacity Gases

What is Heat Capacity? Heat capacity (Specific) of gases is defined as the amount of heat required to raise the temperature of one gram of...