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What evidence leads you to think that reactions in stars are very different from reactions like hydrogen combustion?
With the rate at which stars emit energy, any chemical process would exhaust a stellar mass of reactants in a relatively short time, yet stars last millions to billions of years. The only conclusion is that stars are powered by something many times more energetic than any chemical process.
What else can I help you with?
Why is 2 Mg O2 equals 2 MgO is not a combustion reaction?
The reaction 2 Mg + O2 -> 2 MgO is indeed a combustion reaction, where magnesium (Mg) reacts with oxygen (O2) to produce magnesium oxide (MgO). Combustion reactions are characterized by rapid reactions with oxygen, resulting in the release of energy in the form of heat and light. In this case, magnesium undergoes combustion to form magnesium oxide.
Can h2o burn as a gas?
No, H2O cannot burn as a gas. Water (H2O) is a stable compound formed from hydrogen and oxygen and does not support combustion. Instead, it is often a byproduct of combustion reactions, where hydrogen gas (H2) burns in oxygen (O2) to produce water. Therefore, H2O itself does not have flammable properties.
Why is water identical to the standard enthalpy change of combustion of hydrogen.?
Water is identical to the standard enthalpy change of combustion of hydrogen because the combustion of hydrogen involves its reaction with oxygen to form water. The standard enthalpy change of this reaction is defined by the energy released when hydrogen combusts completely, which results in the formation of water as a product. Thus, the formation of water from hydrogen and oxygen under standard conditions directly correlates to the enthalpy change associated with the combustion process. Hence, the enthalpy change for the formation of water from its elemental components is equivalent to the enthalpy change of hydrogen combustion.
What observations did Antoine Lavoisier make?
Antoine Lavoisier observed that during chemical reactions, matter is conserved and does not appear or disappear. He also recognized the role of oxygen in combustion and respiration, and laid the foundation for the law of conservation of mass in chemical reactions. Additionally, he identified and named oxygen and hydrogen as elements.
Which gas would you get if you carried out these reaction?
To provide an accurate answer, I would need to know the specific reactions you are referring to. Different chemical reactions produce different gases, such as carbon dioxide (CO₂) from the reaction of acids with carbonates, or hydrogen (H₂) from the reaction of metals with acids. Please specify the reactions for a more precise answer.
Can a combustion reaction produce hydrogen?
No. If anything, a combustion reaction will consume hydrogen.
What is difference between hydrogen combustion and compressed natural gas combustion?
All types of combustions are oxidation reactions.
What types of chemical reactions may result in the formation of water?
The most common example of such a reaction would be the combustion of hydrogen gas: 2H2 + O2 --> 2H2O Water is also produced in the combustion of hydrogen compounds (e.g. CH4, H2S), many acid-base reactions, and the decomposition of hydrogen peroxide.
What are the chemical reactions with hydrogen?
Hydrogen can participate in various chemical reactions, such as combustion with oxygen to form water, reaction with halogens to form hydrogen halides, and reaction with metals to form metal hydrides. Hydrogen can also participate in hydrogenation reactions where it adds to unsaturated compounds, such as in the hydrogenation of alkenes to alkanes.
Which atom should be balanced last when balancing hydrocarbon combustuion reactions?
Hydrogen atoms are typically balanced last when balancing hydrocarbon combustion reactions because they are usually the most abundant and straightforward to adjust. It is best to first balance the carbon atoms, then the hydrogen atoms, and finally the oxygen atoms in the reaction.
Why is 2 Mg O2 equals 2 MgO is not a combustion reaction?
The reaction 2 Mg + O2 -> 2 MgO is indeed a combustion reaction, where magnesium (Mg) reacts with oxygen (O2) to produce magnesium oxide (MgO). Combustion reactions are characterized by rapid reactions with oxygen, resulting in the release of energy in the form of heat and light. In this case, magnesium undergoes combustion to form magnesium oxide.
How is it possible then for water which is composed of hydrogen and to put out fires?
The bonds between the hydrogen and oxygen is too strong to be destroyed by combustion. Add: The chemical properties of water are different from the properties of hydrogen and water separately. Therefore, water does not support combustion as oxygen does, and water does not explode as hydrogen does.
How is water different from the elements which made them?
Hydrogen gas and oxygen gas are gases at room temperature. Oxygen supports combustion and hydrogen is very combustible. Water is a liquid at room temperature and is not combustible and does not support combustion.
Does hydrogen support combustion?
Yes, hydrogen is highly flammable and supports combustion. When hydrogen comes into contact with oxygen, it ignites and produces a flame.
How do motors on hydrogen cars differ from combustion or hybrid engines?
Like a gas combustion engine, a hydrogen engine relies on the combustion process - in this case, combustion that results when hydrogen is combined with oxygen. Fuel cells in a hydrogen-powered car then convert this mechanical energy into electrical energy.
Are glow sticks an example of a combustion reaction?
No, a combustion reaction is where a chemical reacts with oxygen to produce an oxide and lots of heat. Glow sticks use a a kind of reaction chemiluminescence. The reactions often involve oxygen particularly hydrogen peroxide, but they are not combustion reactions and typically produce little to no heat
Why is oxygen is different from any other element?
Special chemical reactions such as hydrogen bonding.
