It was the element of aluminium where they predict their properties <span />
Gasoline contains C and H atoms. During combustion, the carbon (C) from the fuel combines with oxygen (O2) from the air to produce carbon dioxide (CO2).
2 C8H18 + 25 O2 → 16 CO2 + 18 H2O.
Combustion reactions release large amounts of heat. They have negative enthalpy. A negative enthalpy represents an exothermic reaction, releasing heat. This reaction is spontaneous and exothermic, since we can obtain energy from the reaction; the ΔG (free energy) is negative (So 1 is true).
ΔG < 0, so the free energy of the system decreases with the reaction. Remember that when there is a negative ΔG the reaction goes from higher free energy to lower free energy, like in this case.
The number of moles in a substance indicates the amount of the substance that contains the same number of particles as 12 g of the Carbon-12 isotope [or equivalent to 6.02 × 10²³] (which is used as a standard in the world of moles).
Now,
if 6.02 × 10²³ atoms are found in 1 mole of C
then let 1.65 × 10²⁴ atoms are found in x
⇒ x = (1.65 × 10²⁴) ÷ (6.02 × 10²³)
= 2.7409 mol
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A sample of 1.65 × 10</span>²⁴ atoms of Carbon (C) would contain ~ 2.74 mol
Answer:
where k is a proportionality constant equal to the ideal gas constant (R) divided by ... Isolated system - System in which neither heat nor work can be transferred between it and its surroundings. ... Gases particles are in a state of constant random motion. ... Does the entropy increase or decrease for the following reactions?
Explanation:
