Question

C+o2= co2+393 кдж выделилось 786 кдж. какой объем co2 образуется при этом

Answer 1

Ответ будет равен 44.8 литров

Answer 2

The chemical equation you provided indicates the reaction of carbon (C) with oxygen (O2) to form carbon dioxide (CO2) with the release of 393 kJ of energy. Additionally, you mentioned that 786 kJ of energy was actually released during the reaction. To find out the volume of CO2 produced, we need to apply some stoichiometry.

First, let's write the balanced chemical equation for the reaction:

C + O2 → CO2

From the given information, we know that the reaction released 786 kJ of energy instead of the expected 393 kJ. This means the reaction was exothermic and released twice the amount of energy it was supposed to. Since the energy released during a chemical reaction is directly proportional to the number of moles of reactants consumed, we can assume that twice the moles of CO2 were produced compared to the expected stoichiometry.

Now, we'll calculate the number of moles of CO2 formed:

Molar enthalpy change (ΔH) of the reaction = 393 kJ (per 1 mole of CO2)

Actual energy released = 786 kJ

Moles of CO2 formed = Actual energy released / ΔH = 786 kJ / 393 kJ/mol = 2 moles

Since we have 2 moles of CO2, we need to find the volume of CO2 at the same temperature and pressure. To do this, we need more information about the temperature, pressure, and whether the gas behaves ideally or not. If the gas behaves ideally, you can use the Ideal Gas Law to find the volume of CO2:

PV = nRT

Where: P = Pressure (in atm) V = Volume (in liters) n = Number of moles (2 moles, as we calculated earlier) R = Ideal gas constant (0.0821 L.atm/mol.K) T = Temperature (in Kelvin)

If you provide the temperature and pressure conditions for the reaction, I can help you calculate the volume of CO2 formed.