La energía térmica es la energía que proviene del calor.
De nada ;)
Answer:
Decrease the volume to increase pressure and to increase concentration
Explanation:
A gaseous reaction is affected by the volume of the reactants. To increase the rate of the forward reaction, we need to ensure that the volume of the reactants is manipulated in such a way that the forward reaction is favored.
Thus, when the volume of reactants is decreased, the pressure increases.This increase in pressure has the same effect as increase in concentration. Hence, the rate of forward reaction increases.
The half-life of Th-232 is 1.405 × 10¹⁰ years
Time elapsed = 2.8 x 10⁹ years
Equation of radioactive decay:
A = A₀ = (1/2)^ t/t₁/₂
where A₀ is the initial amount, A is the amount after time t, t₁/₂ is the half file
The fraction of thorium-232 that remains in the rock after 2.8 billions years is,
A/A₀ = (1/2) ^ (2.8 x 10⁹/ 1.405 × 10¹⁰) = 0.871
Therefore, the percentage of thorium-232 in the rock that was dated at 2.8 billions year = 87.1%
Answer:
Ehthalpy change for the reaction is -323 kJ
Explanation:
Enthalpy change for a reaction, is given as:
Where and represents average bond energy in breaking "i" th bond and forming "j" th bond respectively. and are number of moles of bond break and form respectively.
Reaction:
Here, 2 moles of O-F bond and 2 moles of of O-H bond are broken
1 mol of O=O and 2 moles of H-F bonds are formed.
So,
So,