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formation of snow in clouds conversion of frost to water vapor condensation of rain from water vaporevaporation of water a candle flame forming a cation from an atom in the gas phase mixing sodium sulfite and bleach baking bread rusting iron cooking an egg burning sugar producing sugar by photosynthesis forming ion pairs separating ion pairs Combining atoms to make a molecule in the gas phase splitting a gas molecule apart
Those are some examples
What else can I help you with?
Is a liquid endothermic or exothemic?
A liquid on its own cannot be described as either endothermic or exothermic. The terms endothermic and exothermic are the names of two opposite process reactions. An endothermic reaction absorbs heat and and exothermic reaction gives off heat. A liquid can be involved in either an endothermic reaction or in an exothermic reaction. If you are evaporating a liquid from its liquid phase to its gas phase, then the reaction is usually endothermic and vice versa, going from the gas phase to the liquid phase, the reaction is usually exothermic.
How does an exothermic reaction work and what are the key processes involved in its energy release?
An exothermic reaction is a chemical reaction that releases energy in the form of heat. This occurs when the bonds in the reactants are stronger than the bonds in the products, resulting in excess energy being released. The key processes involved in the energy release of an exothermic reaction include bond breaking, bond formation, and the release of heat energy.
Why do all transformations of energy have a little bit of heat energy?
Whenever energy is transferred or transformed, some of it is inevitably converted into heat. This is due to the second law of thermodynamics, which states that in any energy transfer or transformation, some energy will be lost as heat. This heat energy is often produced due to the inefficiencies in the process, such as friction, resistance, or incomplete conversion of one form of energy to another.
What are the 4 processes involved in physical change?
The four processes involved in physical change are melting, freezing, condensation, and evaporation. In each process, the substance changes state without altering its chemical composition.
What is energy being released?
Energy being released refers to the transformation of stored energy into a different form, such as heat, light, or sound. This release of energy occurs during various processes like chemical reactions, nuclear reactions, or mechanical work. The released energy can have a wide range of effects depending on the source and amount of energy involved.
Are Anions are associated with exothermic or endothermic process?
Anions are not associated with either exothermic or endothermic processes on their own. The classification of a process as exothermic or endothermic depends on the overall energy change of the reaction in which the anion is involved.
Is single replacement reaction exothermic?
Single replacement reactions can be exothermic or endothermic, depending on the specific reactants and products involved. The heat change for each single replacement reaction must be evaluated individually to determine if it is exothermic or endothermic.
Is paper burning with a bright flame a exothermic reaction or endothermic reaction?
Reactions with oxygen (air) involved, like burning paper, are exothermic. Exception: formation of many nitrogen-oxygen compounds (NOx) are endothermic.
How do you classify a chemical reaction?
Chemical reactions can be classified based on the type of reaction (e.g., synthesis, decomposition, single replacement, double replacement) or the energy changes involved (e.g., exothermic, endothermic). Classification helps in understanding the underlying principles and predicting the products of reactions.
Is a liquid endothermic or exothemic?
A liquid on its own cannot be described as either endothermic or exothermic. The terms endothermic and exothermic are the names of two opposite process reactions. An endothermic reaction absorbs heat and and exothermic reaction gives off heat. A liquid can be involved in either an endothermic reaction or in an exothermic reaction. If you are evaporating a liquid from its liquid phase to its gas phase, then the reaction is usually endothermic and vice versa, going from the gas phase to the liquid phase, the reaction is usually exothermic.
Examples of endothermic and exothermic reactions?
Exothermic reactions give out energy overall. Here are some exothermic reactions:- Combustion of fuels such as hydrogen & methane- Neutralisation of an acid by an alkali- Reaction between sulphur & ironEndothermic reactions take in energy overall. Here are some endothermic reactions:- Reactions involved in cooking- The thermal decomposition of calcium carbonate- Photosynthesis in which plants use sunlight, carbon dioxide & water to make their own food
Is polymerization endothermic or exothermic?
Exothermic, because the reaction enthalpy must be negative. With polymerization, the entropy decreases. The Gibbs energy has to be negative. Thus negative reaction enthalpy. Gibbs energy = reaction enthalpy - temperature*entropy
Is the metabolism of carbohydrates endothermic or exothermic?
The metabolism of carbohydrates is exothermic, meaning it releases energy in the form of heat during the various biochemical processes involved in breaking down carbohydrates to produce ATP for cellular energy.
Do all oxidation reactions absorb or liberate heat?
Oxidation reactions can either absorb or liberate heat. It depends on the specific reaction and the molecules involved. Some oxidation reactions are exothermic, releasing heat, while others are endothermic, absorbing heat.
Is bleaching a stain endothermic or exothermic reaction?
Bleaching a stain is typically an exothermic reaction, meaning it releases heat to the surroundings. The chemical reactions involved in bleaching stains usually generate heat as they break down the stain molecules, resulting in a warming effect.
How is energy involved in a chemical reaction?
Activation energy is needed to start a chemical reaction. This energy is used to join the reactants together or break them apart. If a reaction is exothermic then it gives energy out. If it is endo thermic then the reaction takes energy in.
Are all thermal decomposition reactions endothermic in nature?
Yes, but rather: 'most of all' combination reactions are exothermic. This is mostly true for spontaneous, common reactions.Examples of the contrary endothermic reactions, though rare, are:The formation reaction (= combination 'pur sang') of ethene, propene, acetylene, and even benzene is endothermic, when combined out of elements (that's why they are called endothermic compounds). Further a lot of metal hydride's, chlorous oxide: ClO2 are endothermic.The most Exceptional Endothermic Compound is:Dicyanoacetylene, IUPAC-name: but-2-ynedinitrile, C4N2 (or more structural: NC-CC-CN)Standard heat of formation Ho298 ( 4C + N2 --> ) is 500.4 kJ/molBecause of its high endothermic heat of formation, it can explode to carbon powder and nitrogen gas (reversed formation reaction, exo. 500.4 kJ/mol).It burns in oxygen with a bright blue-white flame at a temperature of 5260 K, which is probably the hottest flame of any chemical.
