Answer:
The needed heat is 47,65 Joules.
The phase change is sublimation, so choice A.
I think Batteries you can connect a batteries to a circuit and reaction between chericals
The fact that salt dissolved in water is explained by a property of water. Water is known as a Universal Solvent - that is, it can dissolve solutes for most things.
Answer:
The correct option is 3. No, because atoms are not rearranged to create new substances.
Explanation:
A chemical reaction can be described as a reaction in which reactants combine to form new products. For example, the burning of wood is a chemical reaction.
A physical reaction can be described as the one in which no new products are made. The state of a substance might change from one form to another but no new substance is made. For example, the changing of the state of ice water into liquid water. A new product is not formed in this reaction hence, it is not a chemical reaction.