Answer:
The nucleus emits particles and/or energy
Explanation:
In nuclear decay, the nucleus of an unstable atom (usually with a high neutron number over protons) splits into lighter more stable atoms. The process involves the release of energy particles such as neutrons or beta particles and energy. The released particles bombard with the other unstable atoms in the vicinity and split them producing a chain reaction.
Answer:
A mature stem that has thick bark
Explanation:
i dont know but that is what i put on my test but if you had your awnser right tell me
Answer: 138 J/K
Explanation:
1) ΔS reaction = ΔS products - ΔS reactants
2) ΔS products = 2ΔS Fe(s) + 3 ΔS H₂O (g)
3) ΔS reactants = ΔS Fe₂O₃ (s) + 3 ΔS H₂ (g)
4) Now you have to search the standard entropy values for each product and each reactant in a table.
I found these values at 25° and 1 bar.
ΔS H₂O = 188.8 J/Kₓmol
ΔS Fe(s) = 27.3 J/Kmol
ΔS Fe₂O₃ (s) = 87.4 J/Kmol
ΔS H₂ (g) = 130.7 J/Kmol
5) Replace those values into above equations:
ΔS products = 2ΔS Fe(s) + 3ΔS H₂O (g) =
2 mol × 27.3 J/K×mol + 3 mol ×188.8 J/K×mol = 621.0 J/K
ΔS reactants = ΔS Fe₂O₃ (s) + 3 ΔS H₂ (g) =
1mol × 87.4 J/K×mol + 3×130.7 J/K×mol = 479.5 J/K
ΔS reaction = 621.0 J/K - 479.5 J/K = 141.5 J/K
Taking into account the differences in the values from different sources (specially due to the temperature), you can consider that the value 141.5 J/K is pretty much close to 138 J/K, and take that answer.