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What is meant by exothermic reaction?
an exothermic reaction is when two chemical react with each other and give out heat (the temperature increases). This is because bonds have to be broken and this involves extra energy being released, this energy is released as heat
What does a negative value for heat represent?
A negative value for heat typically represents heat being released or removed from a system, resulting in a decrease in temperature or a cooling effect. It indicates an exothermic process where energy is being released to the surroundings.
What is the energy released when steam condenses to water?
The energy released when steam condenses to water is called the latent heat of vaporization. This energy is released in the form of heat as the steam loses its thermal energy and transitions back into liquid water.
What could best be used to demonstrate energy being transformed from electricity to heat?
An electric heater is a common example that demonstrates the transformation of electrical energy into heat. When electricity runs through a resistive element in the heater, it generates heat through resistance, warming up the surrounding air. This showcases the conversion of electrical energy into thermal energy in a straightforward way.
Is heat added or released during freezing?
This is latent heat. When a liquid freezes heat is released, and when it melts the same amount of energy must be supplied. Similarly when a liquid changes to a vapor, or when a vapor condenses, heat must be supplied or is released. Latent heat varies from one substance to another, and can be quantified as so many calories per gram or kilogram, you can find data in reference tables
Who can you tell demonstrates energy being released to heat?
A burning candle is a good example of energy being released as heat. As the candle burns, the chemical energy stored in the wax is converted into heat and light energy, with the majority of the energy being released as heat. This process demonstrates the conversion of one form of energy (chemical) into another (thermal).
What form of energy that is not useful is being released from a flashlight when it is on?
In flashlight, light energy that is not being used effectively is being released in the form of heat. This is due to inefficiencies in the conversion of electrical energy to light energy, resulting in some of the energy being lost as heat.
An avalanche demonstrates what kind of energy to heat energy?
An avalanche demonstrates potential energy converting into kinetic energy. Heat energy is not directly related to an avalanche but may be generated due to friction as the snow particles rub against each other during the avalanche.
What is a form of demonstrate energy being transformed from electricity to heat?
An electric heater is a common device that demonstrates the transformation of electrical energy into heat energy. When electricity flows through the heating element in the heater, it encounters resistance, which generates heat as a byproduct. This process illustrates the conversion of electrical energy to thermal energy.
What type of energy is being released from a burning candle?
The energy being released from a burning candle is primarily in the form of heat and light. The flame is the result of a chemical reaction between the wax and oxygen, producing energy in the form of heat and light.
How is petroleum energy released?
Petroleum energy is released through combustion, where the fuel is burned in the presence of oxygen to release heat energy. This heat energy is then used to generate electricity or power engines in vehicles and machinery.
Why is energy released in a exothermic reaction?
Energy is released in an exothermic reaction because the overall energy of the products is lower than the energy of the reactants. This difference in energy levels is released as heat to the surroundings, making the reaction exothermic.
What occurs when energy is being given off or absorbed?
When energy is being given off, it is released in the form of heat, light, or sound depending on the source. When energy is being absorbed, it is taken in and used to perform work or to trigger chemical reactions.
A wood log burning in a fireplace what kind of energy is taking place?
Stored Chemical energy being converted to, and released as Heat energy.
What form of energy is being used as a candle burns?
Chemical energy is being converted into heat and light energy as a candle burns. The chemical energy stored in the wax molecules is released as heat and light when the wax undergoes combustion.
When coal is burned stored energy is being released in the form of?
When coal is burned, stored energy is released in the form of heat. This heat is typically used to generate electricity by heating water to produce steam, which drives turbines connected to generators.
When an objects temperature is decreasingis energy being absorbed or released by the object?
When an object's temperature is decreasing, energy is being released by the object. This is because the object is losing heat to its surroundings, leading to a decrease in temperature.
