Question

Термохимическое уравнение реакций оксида меди (CuO), солянной кислотой (HCl): CuO + 2HCl = Cu Cl2 + H2O + 69. Сколько теплоты выделяется при растворении 200гр CuO в HCl

Answer 1

2,5 моль          -                      х кДж
CuO + 2HCl = Cu Cl2 + H2O + 69
1 моль             -                     69  кДж
n(CuO)=200/80=2.5 моль 

х=2,5*69/1=172,5 кДж

Answer 2

Thermochemical Equation for the Reaction between Copper Oxide (CuO) and Hydrochloric Acid (HCl)

The thermochemical equation for the reaction between copper oxide (CuO) and hydrochloric acid (HCl) is as follows:

CuO + 2HCl → CuCl2 + H2O

According to the given equation, 69 units of heat are released during the reaction.

Calculating the Heat Released during the Reaction

To calculate the amount of heat released during the reaction, we need to use the concept of molar heat of reaction (ΔH). The molar heat of reaction is the amount of heat released or absorbed when one mole of a substance reacts.

To find the heat released when 200 grams of CuO reacts with HCl, we need to follow these steps:

1. Convert the mass of CuO to moles: - The molar mass of CuO is 79.55 g/mol (63.55 g/mol for Cu + 16.00 g/mol for O). - Divide the given mass (200 g) by the molar mass to get the number of moles.

2. Use the stoichiometry of the balanced equation to determine the moles of HCl reacted: - According to the balanced equation, 1 mole of CuO reacts with 2 moles of HCl. - Multiply the moles of CuO by the stoichiometric ratio to get the moles of HCl.

3. Calculate the heat released using the molar heat of reaction: - The molar heat of reaction (ΔH) is given as 69 units of heat. - Multiply the moles of HCl by the molar heat of reaction to get the heat released.

Let's perform the calculations:

1. Moles of CuO: - Molar mass of CuO = 79.55 g/mol - Moles of CuO = 200 g / 79.55 g/mol

2. Moles of HCl: - According to the balanced equation, 1 mole of CuO reacts with 2 moles of HCl. - Moles of HCl = Moles of CuO * (2 moles HCl / 1 mole CuO)

3. Heat released: - Molar heat of reaction (ΔH) = 69 units of heat - Heat released = Moles of HCl * ΔH

Please note that the specific value of the molar heat of reaction (ΔH) may vary depending on the source. However, the calculations provided above should give you an approximate value for the heat released during the reaction.