Question

3. Вычислите объем водорода необходимый для взаимодействия с 8 г меди. (условия нормальные). (а) Уравнение химической реакции взаимодействия оксида меди и водорода: H2(6) + CuO Cu + H20 I (і) Вычислите количество вещества оксида меди: (1) (ii) Вычислите количество вещества водорода: (1) (iii) Вычислите объём (н.у.) водорода, применяя Закон Авогадро. (1) Активация оор (b) Ответ О фокусировка

Answer 1

Дано :

m(Cu)=8 г

V(H₂) - ?

Решение :

H₂+CuO=Cu+H₂O

n(CuO)=m/M=8/64=0,125 моль, где М - молярная масса меди (г/моль)

n(H₂)=n(CuO)=0,125 моль

V(H₂)=nVm=0,125*22,4=2,8 л

(і) Вычислите количество вещества оксида меди:  0,125 моль

(ii) Вычислите количество вещества водорода:  0,125 моль

(iii) Вычислите объём (н.у.) водорода, применяя Закон Авогадро : 2,8 л

Answer 2

Calculation of the Volume of Hydrogen Required for the Reaction with 8g of Copper

To calculate the volume of hydrogen required for the reaction with 8g of copper, we need to follow these steps:

(i) Calculate the amount of copper oxide (CuO) To determine the amount of copper oxide, we need to use the molar mass of CuO. The molar mass of copper (Cu) is approximately 63.55 g/mol, and the molar mass of oxygen (O) is approximately 16.00 g/mol. Therefore, the molar mass of CuO is:

Molar mass of CuO = (1 * molar mass of Cu) + (1 * molar mass of O) = (1 * 63.55 g/mol) + (1 * 16.00 g/mol) = 79.55 g/mol

Next, we can calculate the amount of copper oxide using the given mass of copper (8g) and the molar mass of CuO:

Amount of CuO = (mass of Cu) / (molar mass of CuO) = 8g / 79.55 g/mol = 0.1006 mol

(ii) Calculate the amount of hydrogen The balanced chemical equation for the reaction between copper oxide (CuO) and hydrogen (H2) is:

H2 + CuO -> Cu + H2O

From the equation, we can see that the stoichiometric ratio between CuO and H2 is 1:1. Therefore, the amount of hydrogen is equal to the amount of copper oxide:

Amount of H2 = Amount of CuO = 0.1006 mol

(iii) Calculate the volume of hydrogen at standard temperature and pressure (STP) using Avogadro's Law According to Avogadro's Law, equal volumes of gases at the same temperature and pressure contain an equal number of molecules. At standard temperature and pressure (STP), the volume of 1 mole of any gas is 22.4 liters.

Therefore, the volume of hydrogen at STP can be calculated as follows:

Volume of H2 = Amount of H2 * Molar volume at STP = 0.1006 mol * 22.4 L/mol = 2.25 L

So, the volume of hydrogen required for the reaction with 8g of copper is 2.25 liters.

Please note that the given sources did not provide specific information related to this calculation.