both processes are exothermic
both processes are endothermic
the dissolution of metallic sodium is endothermic
the dissolution of metallic sodium is exothermic
the dissolution of sodium chloride is explosive
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the ansa is d. Reason:when a piece metallic sodium is dropped into a beaker of water,the sodium reacts with water acording to the eqation 2Na+2H2O---2NaOH+H2
.the sodium begins to melt @ a temperature of 97.8 deg. Celcius(melting point of sodium).there is a great amount of heat given off at this moment(exothermic reaction).the heat in the surroundings ignites d hydrogen gas given off in d reaction and causes it to burn with a bright flame.
Here is an explanation:
this should be noted, when bond is formed, heat is released, since sodium is a very reactive metal, that form a bond when it reacts, therefore the dissolution of sodium metal in water result in the formation of a compound(SODIUM HYDROXIDE), and in the process, heat is released which is exothermic reaction.
This is a pratical that should ave been done in secondary school.Now,get it clear
sodium chloride(Nacl) is also known as table salt(which we all use at home) and when dissolved in water does not liberate heat(try it at home)WHILE metallic sodium or sodium Pellet is a solidified sodium crystal which is white in nature,bt when put in a glass jar containing water nd coverd,one will feel the hotness of the jar if touched as d metallic sodium dissolves.This is to show that HEAT is been Liberated nd this confirms that the rxn is EXOTHERMIC in nature.
D ans is "D" cos in NaCl, Cl always takes electrons nd in metallic sodium like for example zinc or Cu(copper) as a metallic element always gives out it's electrons for those elements who needs it. And exothermic reaction is d process in which heat(or we can say electrons) is released to d surroundins while Endothermic reaction in which heat or elecrons in absorbed in d surrounding.
Can some explain further more pls. I know exothermic rxn is 1 which heat is released. But are we suppose to cram the rxn btw d sodium chloride n metallic sodium or is there a method to derive dat d rxn is exothermic??? RSVP, ASAP.
Nacl(common salt) wen dissolve in H2O feels cold which is endothermic,while metallic sodium gives out heat..rem all metals are gud conductors of heat
option D actually the actually the correct answer bcosl metalic na undergoes exothermic rxn in both h2o and dil.h2so4
Na and K are very reactive metal they easily react wit water to liberate their oxides and hydrogen gas, remember in their salt form they react water to form their base and hydrochloric acid. Note the liberation of hydrogen gas is highly exothermic.
Altho most of d contributns here re right,,bt i'd lik d admin to giv a convincn xplanatn,,coz if we tend to read al d contributns here one wud tend 2 be confused as to wich one we re to folow as d real answa,,,so admin pls shed more light on d real answ pls....
Let Me Really Be Of Great Help Here. Whenever You Notice A Compound Or Rather A Reaction In Which Heat Is Not Supplied, Then You Know It's An exothermic Reaction Because It Doesn't Need Any More Heat Quantity To React.
When metalic sodium dessolves in water an explosion occures with smokes rising 4rm the reaction to the environment showing that it is an exothermic reaction but when sodium chloride dessolves in what the container becomes hot 2 touch showing that it is absorbing heat as an endothermic reaction
Adekoya kenny
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Ohm..👀 endothermic reactant is greater than its product, That's why is reaction absorb around its surrounding
But while exothermic, reactant is lower than the product, that's why plenty of eat is given off, and it's evolve, it's either it combust,given off plenty off, the solution will be bery sorry very😄 hot in its surrounding...e.g burning of refuge fossil fuel...you know you can't go close to it, because it gives out all its heat energy,... Gracia's
d ansa is d bcos the soln of both tend to release heat into the environment, hence dey are exothermic.
When sodium chloride is dissolved in water, there's a drop in the temperature of the containing vessel showing reaction is endothermic.
Metallic sodium dissolves explosively.
