Can someone help me I am stuck on this question it would mean the world if u helped me =) have a nice day!
2 answers:
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Answer: [tex]CO_2(s)\rightarrow CO_2(g)[/tex]
Explanation:
Entropy is the measure of randomness or disorder of a system. If a system moves from an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.
is positive when randomness increases and
is negative when randomness decreases.
a)
2 molesof gas are converting to 2 moles of another gas , thus is zero.
b)
1 mole of solid is converting to 1 mole of liquid, the randomness increases and thus is positive.
b)
2 moles of ions are converting to 1 mole of solid, the randomness decreases and thus is negative
d)
1 mole of solid is converting to 1 mole of gas, the randomness increases drastically and thus is highly positive.
The given equation is,
<u>Answer:</u> The tree was burned 16846.4 years ago to make the ancient charcoal
<u>Explanation:</u>
The equation used to calculate rate constant from given half life for first order kinetics:
where,
= half life of the reaction = 5715 years
Putting values in above equation, we get:
Rate law expression for first order kinetics is given by the equation:
where,
k = rate constant =
t = time taken for decay process = ? yr
= initial amount of the sample = 100 grams
[A] = amount left after decay process = 13 grams
Putting values in above equation, we get:
Hence, the tree was burned 16846.4 years ago to make the ancient charcoal