Answer:
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<h2>Answer:</h2>
B) endothermic reaction.
<h2>Explanation:</h2>
Melting of ice is endothermic because it is taking heat from the environment, feeling cold, because it requires energy to break the ice bonds. It's also why you feel cold when wet it takes energy to evaporate water. The ice absorbs the energy from the environment. Its internal potential energy increases, therefore, it's endothermic. It also increases the entropy of reaction.
Answer:
The speed is positive either direction.
Explanation:
- It is given that, a vehicle travels at the same speed from point A to point B then from point B to point A.
- We know that speed is a scalar quantity and velocity is a vector quantity.
- Speed has only magnitude while velocity have both magnitude as well as direction.
- In this case, the vehicle will have positive speed in either direction.
- Hence, the correct option is (D)
Answer:
LiOH + KCl —> LiCl + KOH
Explanation:
LiOH + KCl —> LiCl + KOH
The equation is balanced since we have the same number atoms of the different elements on both side of the equation
