4 in hydrogen 4 in oxygen
Explanation:
hope this helps
<h2>
Answer:</h2>
The water has higher specific heat capacity which affects the lakes largely in such way that the water in a lake changes temperature slowly.
<h2>
Explanation:</h2>
Evaporation is a process of liquid changing its state to gaseous state at any temperature. Water has high specific heat due to the presence of strong hydrogen bonds. Due to which it requires heat in huge amount to raise the water (in large quantity) temperature.
Thus, the molecules will be unable to gain much kinetic energy that result in changing the temperature very slowly.
Answer is: the enthalpy is -4383.2 kJ.
Reaction 1: 2M(s) + 6HCl(aq) → 2MCl₃(aq) + 3H₂(g); ΔrH₁ = -725.0 kJ.
Reaction 2: HCl(g) → HCl(aq); ΔrH₂ = -74.8 kJ.
Reaction 3: H₂(g) + Cl₂(g) → 2HCl(g); ∆rH₃ = -1845.0 kJ.
Reaction 4: MCl₃(s) → MCl₃(aq); ΔrH₄ = -476.0 kJ.
Reaction 5: 2M(s) + 3Cl₂(g) → 2MCl₃(s); ΔrH₅ = ?
Using Hess's law (substances that appear in the left and right side of the first, second, third and fourth reaction must cancel out to get fifth reaction):
ΔrH₅ = ΔrH₁ - 6 · ΔrH₂ + 3 · ΔrH₃ - 3 · ΔrH₄.
ΔrH₅ = -725 kJ - 6 · (-74.8 kJ) + 3 · (-1845 kJ) - 3 · (-476 kJ).
ΔrH₅ = -4383.2 kJ.