Answer: d) -705.55 kJ
Explanation:
Heat of reaction is the change of enthalpy during a chemical reaction with all substances in their standard states.
Reversing the reaction, changes the sign of
On multiplying the reaction by , enthalpy gets half:
Thus the enthalpy change for the given reaction is -705.55kJ
Answer:
241
Explanation:
all the numbers are significant but since you only need three it's only the first three numbers
Science is mostly math, for example, chemistry is derived from math one element is completely mathb, you have to man y different ways of figuring out different parts of an element and you even have to find the atomic number and why the atom is so small which can be figured out by an equation. Math and science are both incorporated together because you wouldn't have science without math.
Answer:
108.9 L.
Explanation:
- We can use the general law of ideal gas: <em>PV = nRT.</em>
where, P is the pressure of the gas in atm.
V is the volume of the gas in L.
n is the no. of moles of the gas in mol.
R is the general gas constant,
T is the temperature of the gas in K.
- If n and T are constant, and have different values of P and V:
<em>(P₁V₁) = (P₂V₂).</em>
P₁ = 125 mm Hg, V₁ = 136.5 mL,
P₂ = 156.7 mm Hg, V₂ = ??? mL.
<em>∴ V₂ = (P₁V₁)/(P₂) =</em> (125 mm Hg)(136.5 mL)/(156.7 mm Hg) =<em> 108.9 L.</em>