0
What else can I help you with?
What is the heat balance equation for a exothermic reaction?
For an exothermic reaction, heat should appear as a product since heat is given off. Thus, it would be A + B ==> C + D + heat
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.
What compound does sodium and water make?
The reaction is: 2 Na(s) + 2H2O(l) = 2 NaOH(aq) + H2(g) So, the compound made is sodium hydroxide. It is an exothermic reaction and you can get fire. You should be very careful.
What chemical can be combined with water to create an exothermic reactions?
Many elements have this property, including all the alkali metals and the heavier alkaline earth metals. Also, many compounds such as sulfuric acid have exothermic heats of solution, but solution is not technically a "reaction."
Do a chemical reaction produce heat and light?
Chemical reactions can produce heat and energy but not all chemical reactions produce them. Exothermic reactions produce heat and energy (possibly in the form of photons/light), while endothermic reaction absorb them.
How should a student use a thermometer to determine if a reaction is exothermic?
To determine if a reaction is exothermic, a student should use a thermometer to measure the temperature change during the reaction. If the temperature increases, it indicates that the reaction is exothermic, releasing heat.
How should a student use the keyword "heat" to determine if a reaction is exothermic?
A student can use the keyword "heat" to determine if a reaction is exothermic by observing if heat is released during the reaction. If the reaction gives off heat, it is exothermic.
Is mixing sodium sulfite and bleach endothermic or exothermic?
Mixing sodium sulfite and bleach is an exothermic reaction. Heat is released during the reaction, making the surroundings warmer. This reaction should be performed with caution as it can produce toxic gases.
What is the heat balance equation for a exothermic reaction?
For an exothermic reaction, heat should appear as a product since heat is given off. Thus, it would be A + B ==> C + D + heat
Is the reaction between sodium and water endothermic?
The reaction between sodium and water is exothermic because it releases heat energy. When sodium comes into contact with water, it reacts vigorously, producing hydrogen gas and sodium hydroxide while giving off heat in the process.
What kind of enthalpy change favors a spontaneous reaction?
For a spontaneous reaction, the overall change in enthalpy should be negative (exothermic). This means that the products have a lower enthalpy than the reactants, releasing energy in the form of heat.
Is the neutralization of hydrochloric acid an exothermic or endothermic reaction?
ExothermicNeutralizing or even diluting a concentrated acid can be very exothermic. It can even cause the solution to boil if you are not careful! This is extremely dangerous! This is why when diluting concentrated acids (any kind) you should ADD ACID TO WATER and not the opposite.See the link below for more information about this important safety issue in the laboratory due to the exothermic nature of this reaction.
How is destroyed?
by the addition of alcohol. however this should be done with extreme caution as it is highly exothermic reaction and may even catch fire.
Should intelligence tests affect how schools handle student?
No. Intelligence tests cannot determine how sucessful a student can be.
How is sodium destroyed?
by the addition of alcohol. however this should be done with extreme caution as it is highly exothermic reaction and may even catch fire.
What is the temperature that should be maintained to proceed the reaction of sodium hydroxide with hydrochloric acid?
The problem is to keep this very exothermic reaction cooled down.It even runs very fast is ice water.
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.
