If you're looking for "what rocks are formed by changes..." it's Igneous Rocks.
<span>The water soaks in the cracks of rocks, freezes and expands breaking the rock apart.</span>
Answer:
I'm sorry but I'm not doing the whole test
Explanation:
The answer from this questions is the letter
B. He should not use his opinions as evidence.
ANSWER
EXPLANATION
Given that
The energy released by the system is 12.4J
Work done on the surrounding is 4.2J
Follow the steps below to find the change in energy
In the given data, energy is said to be released to the surroundings
Recall, that exothermic reaction is a type of reaction in which heat is released to the surroundings. Hence, change in enthalpy is negative
Step 1; Write the formula for calculating change in energy

Since heat is released to the surrounding, then q = -12J
Recall, that work done by the system on the surroundings is always negative
Hence, w = -4.2J
Step 2; Substitute the given data into the formula in step 1

Therefore, the change i