when reactant A was mixed with reactant B in a beaker, the beaker become cold and new products C and D were formed is this an exothermic or endothermic reaction give reasons for your answer..
Answers
Answer:
The teacher replies: “That’s because you were given two different salts. One of your salts generated an endothermic reaction with water, while the other salt generated an exothermic reaction with water. Let me first reveal the identity of your salts: Salt A is ammonium nitrate (\text{NH}_4\text{NO}_3NH
4
NO
3
start text, N, H, end text, start subscript, 4, end subscript, start text, N, O, end text, start subscript, 3, end subscript) and Salt B is calcium chloride (\text{Ca}\text{Cl}_2CaCl
2
start text, C, a, end text, start text, C, l, end text, start subscript, 2, end subscript)."
Now, Sam and Julie are curious about the difference between an endothermic and an exothermic reaction.
Consider the reaction mixture—salt plus water—as the system and the flask as the surrounding.
In Sam’s case, when ammonium nitrate was dissolved in water, the system absorbed heat from the surrounding, the flask, and thus the flask felt cold. This is an example of an endothermic reaction. In Julie’s case, when calcium chloride was dissolved in water, the system released heat into the surroundings, the flask, and thus the flask felt hot. This is an example of an exothermic reaction.
Answer:
How do you know if the reaction is exothermic or endothermic?
An exothermic reaction releases heat. ... So if the sum of the enthalpies of the reactants is greater than the products, the reaction will be exothermic. If the products side has a larger enthalpy, the reaction is endothermic.
Explanation:
When a reaction gets colder is it endothermic?
An endothermic reaction is the opposite. This is when a reaction starts colder and ends up hotter, taking in energy from start to finish. In an endothermic reaction, the system gains heat as the surroundings cool down. In an exothermic reaction, the system loses heat as the surroundings heat up.