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Chemical bonds in chemisorption are much stronger.
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Is ionisation enthalpy of potassium higher than that of sodium?
The ionisation enthalpy of potassium is lower than that of sodium.
How do you know if an enthalpy change diagram is endothermic or exothermic?
If you plot the reaction coordinate (what I think you mean by "enthalpy change diagram"), the reaction will be exothermic if the products are lower on the graph than the reactants. If they are higher than it is endothermic. For instance, if you go to the linked Wikipedia page (link to the left of this answer), the graph shown is of an exothermic reaction.
Enthalpy changes accompanying a change of state are than those accompanying the heating of a substance at each state?
Any change of state involve a change of the system enthalpy.
Why oxygen have less ionisation enthalpy than fluorine?
Oxygen has a lower electronegativity than fluorine (3.5 as compared to 4).
Why does surgical spirit evaporate faster than water?
The ethanol enthalpy of vaporization is lower compared to water.
Is ionisation enthalpy of potassium higher than that of sodium?
The ionisation enthalpy of potassium is lower than that of sodium.
In an exothermic reaction is the energy of the products higher or lower than that of the reactants?
In an exothermic reaction the energy of the products is less than that of the reactants.
Why is enthalpy change of atomization of bromine is higher than bond enthalpy?
because u need to dissconnect the inter-molecular bonds aswell.(it's natural state is liquid) not only the covalent ones.
What is the sign of the enthalpy change for an endothermic reaction?
Endothermic reaction: In an endothermic reaction, the products are higher in energy than the reactants. Therefore, the change in enthalpy is positive, and heat is absorbed from the surroundings by the reaction therefore enthalpy change show positive sign in a endothermic reaction..
How do you know if an enthalpy change diagram is endothermic or exothermic?
If you plot the reaction coordinate (what I think you mean by "enthalpy change diagram"), the reaction will be exothermic if the products are lower on the graph than the reactants. If they are higher than it is endothermic. For instance, if you go to the linked Wikipedia page (link to the left of this answer), the graph shown is of an exothermic reaction.
What Enthalpy change?
The enthalpy change equals the energy transferred from the environment through heating or work other than expansion work.
What is the bond length of nitrous oxide?
This might not be of much help, but it is longer than Nitrogen monoxide, as the bond enthalpy is higher in a N-O bond. There is not much on this issue on the Internet unfortunately.
How would you explain the fact that the first ionization enthalpy of sodium is lower than that of magnesium but its second ionization enthalpy is higher than that of magnesium?
Sodium has only one valence electron, and when that is donated to some other atom, the remaining ion has a noble gas configuration that is highly stable. Disrupting that by another ionization requires much energy. Magnesium has two valence electrons; therefore the second is almost as easy to donate as the first. The third ionization enthalpy of magnesium would be very high.
Why does sodium chloride melt ice faster than calcium chloride and magnisium solfate?
It is not correct: calcium chloride is more efficient (but also more expensive); the cause is that the CaCl2 enthalpy of dissolution is higher.
Why does water evaporate quicker than liquid soap?
The enthalpy of vaporization is different.
Why is iron cheaper than aluminium?
Enthalpy of combustion of aluminium is much more intensive than that of iron.
Enthalpy changes accompanying a change of state are than those accompanying the heating of a substance at each state?
Any change of state involve a change of the system enthalpy.
