Explanation:
It is the motion of particles that creates a form of energy called heat (or thermal) energy that is present in all matter. Tiny particles in solids, liquids and gases are always in motion. It is the motion of particles that creates a form of energy called thermal (heat) energy that is present in all matter.
The gram-formula mass of citric acid is 3(1)+6(12)+5(1)+16(7)=192 g/mol.
This means that in 13.00 grams of citric acid, there are 13.00/192 = 0.067 moles.
From the equation, we know that for every 1 mole of citric acid that is consumed, 3 moles of carbon dioxide are produced.
This means that there are 3(0.067)=0.203 moles.
Since the gram-formula mass of carbon dioxide is 12+2(16)=44 g/mol, meaning it has a mass of 0.203(44)=8.93 g
Answer:
474.92 mL.
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 is constant, and have two different values of (P, V and T):
<em>P₁V₁T₂ = P₂V₂T₁</em>
<em></em>
P₁ = 740 mmHg, V₁ = 450 mL, T₁ = 16°C + 273 = 286 K.
P₂ = 760 mmHg, V₂ = ??? mL, T₂ = 37°C + 273 K = 310 K.
<em>∴ V₂ = P₁V₁T₂/P₂T₁ </em>= (740 mmHg)(450 mL)(310 K)/(760 mmHg)(286 K) = <em>474.92 mL.</em>
Answer:
The net chemical reaction of the given process:
Explanation:
Step 1: Manganese (II) carbonate and oxygen react to form manganese (IV) oxide and carbon dioxide.The chemical reaction is given as:
Step 2:Manganese (IV) oxide and aluminum react to form manganese and aluminum oxide.The chemical reaction is given as:
On adding reactions of 3 × [1] + 2 × [2] , we get net chemical reaction of the given process:
According to reaction,6 moles of manganese(II0 carbonate recats with 3 moles of oxygen gas and 8 moles of aluminum to give 6 moles of manganese , 6 moles of carbon dioxide gas and 4 moles of aluminum oxide.
Answer is: 13181,7 kJ of energy <span>is released when 10.5 moles of acetylene is burned.
</span>Balanced chemical reaction: C₂H₂ + 5/2O₂ → 2CO₂ + H₂O.
<span>ΔHrxn = sum of
ΔHf (products of reaction) - sum of ΔHf (reactants).</span><span>
Or ΔHrxn = ∑ΔHf (products of reaction)
- ∑ΔHf (reactants).
ΔHrxn - enthalpy change of chemical reaction.
<span>ΔHf - enthalpy of formation of reactants or
products.
</span></span>ΔHrxn = (2·(-393,5) + (-241,8)) - 226,6 · kJ/mol.
ΔHrxn = -1255,4 kJ/mol.
Make proportion: 1 mol (C₂H₂) : -1255,4 kJ = 10,5 mol(C₂H₂) : Q.
Q = 13181,7 kJ.