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What else can I help you with?
How do you know it is a exothermic reaction?
If you are in a lab and want to tell whether a reaction was exothermic, carefully check the temperature of the reaction vessel. If the reaction was exothermic, the vessel will be warmer than it was before the reaction occurred. If you are looking at a reaction on paper, you will need a table of thermodynamic data. It should contain the molar enthalpies of formation, represented by H, of each of the reactants and products (note: if a reactant or product is an element in its most stable state, like H2(g) or Zn(s), the enthalpy of formation is defined as zero, so they may be left out of the table). Multiply the number of moles of each product and reactant by its molar enthalpy. Add up all the results for the products and subract all the results for the reactants. If your net result is negative, the reaction was exothermic. If it is positive, the reaction was endothermic. Example: CH4(g)+2O2(g)-->CO2(g)+2H2O(g) Delta H (kJ/mol) CH4(g) -74.8 O2(g) 0 CO2(g) -393.5 H2O(g) -241.82 Products: 2(-241.82)+(-393.5)= -877.14 kJ Reactants: -74.8+2(0)= -74.8 kJ Total: -877.14-(-74.8)= -802.34 kJ The reaction was exothermic.
How do you tell endothermic reaction from an exothermic reaction by looking at the chemical equation?
You have to add up the bond energies of all the bonds on the products side and the reactants side. When bonds are formed energy is released. Conversely energy has to be put into a system to break bonds (like smashing a block of ice with a baseball bat) If there is more bond energy on the products side bonds were created (energy was released) which means the reaction is exothermic. If there is more bond energy on the reactants side, bonds were broken (energy put in) and so the reaction is endothermic.
Is sweating a chemical reaction?
Sweating itself is not a chemical reaction. Sweating is the body's mechanism to regulate body temperature by releasing sweat, which is mainly composed of water and electrolytes. However, the process of sweat production by the sweat glands involves cellular processes within the body, which are chemical reactions.
What can you tell about the reaction from the diagram?
To provide an accurate analysis of the reaction from the diagram, I would need to see the diagram itself. However, generally speaking, one can infer details such as the type of reaction (e.g., exothermic or endothermic), the reactants and products involved, and any changes in energy or state. Observing the direction of arrows, labels, or graphs can also reveal the kinetics or equilibrium of the reaction. If you describe the diagram, I can offer more specific insights!
Is the combustion of methane an exothermic or endotermic?
Endothermic means that the net energy produced when chemical bonds reform is less that the energy required to break the original bonds. (It gets cold because it need more energy from the surrounding molecules)Exothermic means that the net energy produced is more than the required energy to break the original bonds. (it gets hot because it releases energy)Using logic and personal experiences, when you ignite something, such as methane, it burns. just the fact that it burns shows that it is releasing energy in the form of light/heat. this makes the combustion of methane Exothermic.
How can you tell the difference between an endothermic and exothermic reaction?
You can generally tell by changes in temperature, whether you have an exothermic reaction which produces heat, or an endothermic reaction which consumes heat.
What does the potential energy diagram of a chemical reaction tell you?
A potential energy diagram of a chemical reaction illustrates the energy changes that occur as reactants are converted into products. It shows the activation energy required for the reaction to proceed and whether the overall process is exothermic or endothermic. The diagram can also reveal the stability of the reactants and products.
What is the word used to describe a chemical reaction in which energy is released?
Any chemical reaction that releases energy is called an exothermic action. The equations for an exothermic reaction between substance A and substance B would be: A + B --> AB + Heat The heat represents the energy and we can tell it is being released because it is on the product side of the equation. The reverse reaction would be endothermic, meaning it requires energy, heat would be on the reactant side and the equation would be: AB + Heat --> A + B To sum things up, an exothermic reaction releases energy and heat will be on the product side of the equation. An endothermic reaction requires energy and heat will be on the reactant side of the equation.
What does h tell about a reaction?
The reaction is exothermic.
How do you know it is a exothermic reaction?
If you are in a lab and want to tell whether a reaction was exothermic, carefully check the temperature of the reaction vessel. If the reaction was exothermic, the vessel will be warmer than it was before the reaction occurred. If you are looking at a reaction on paper, you will need a table of thermodynamic data. It should contain the molar enthalpies of formation, represented by H, of each of the reactants and products (note: if a reactant or product is an element in its most stable state, like H2(g) or Zn(s), the enthalpy of formation is defined as zero, so they may be left out of the table). Multiply the number of moles of each product and reactant by its molar enthalpy. Add up all the results for the products and subract all the results for the reactants. If your net result is negative, the reaction was exothermic. If it is positive, the reaction was endothermic. Example: CH4(g)+2O2(g)-->CO2(g)+2H2O(g) Delta H (kJ/mol) CH4(g) -74.8 O2(g) 0 CO2(g) -393.5 H2O(g) -241.82 Products: 2(-241.82)+(-393.5)= -877.14 kJ Reactants: -74.8+2(0)= -74.8 kJ Total: -877.14-(-74.8)= -802.34 kJ The reaction was exothermic.
Was the reaction of hydrogen and oxygen endothermic or exothermic How could you tell?
The reaction of hydrogen and oxygen to form water is exothermic, meaning it releases energy in the form of heat. This can be determined by observing that the overall energy level of the products (water) is lower than the energy level of the reactants (hydrogen and oxygen).
How do you tell endothermic reaction from an exothermic reaction by looking at the chemical equation?
You have to add up the bond energies of all the bonds on the products side and the reactants side. When bonds are formed energy is released. Conversely energy has to be put into a system to break bonds (like smashing a block of ice with a baseball bat) If there is more bond energy on the products side bonds were created (energy was released) which means the reaction is exothermic. If there is more bond energy on the reactants side, bonds were broken (energy put in) and so the reaction is endothermic.
What does a positive H tell about a reaction?
The reaction is endothermic.
What does a negative deltaH tell about a reaction?
the reaction is exothermic
How can you tell if a chemical equation is endothermic?
An endothermic reaction absorbs heat from its surroundings, causing a decrease in temperature. In a chemical equation, if the products have a higher energy content than the reactants, it indicates that the reaction is endothermic. This can be determined by examining the enthalpy change (∆H) of the reaction.
What piece of information will tell you which way the equilibrium of a reaction will shift due to a change in temperature?
The sign of the enthalpy change (∆H) of the reaction will indicate the direction in which the equilibrium will shift with a change in temperature. If ∆H is negative (exothermic reaction), an increase in temperature will shift the equilibrium towards the reactants; if ∆H is positive (endothermic reaction), an increase in temperature will shift the equilibrium towards the products.
What does a positive delta H tell about reaction?
A positive delta H indicates that the reaction is endothermic, meaning it absorbs heat from the surroundings to proceed. This implies that the products have higher energy content compared to the reactants.
