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4 years ago

What's catalyst. The properties of catalyst

Chemistry

2 answers:

AlexFokin [52]4 years ago

5 0

Answer:

Catalyst is a substance that increases the rate of a chemical reaction but is chemically unchanged at the end of the reaction.

properties of catalyst :

1. A catalyst increases the speed of a reaction, and it also improves the yield of the intended product.

2. A catalyst actually takes part in the reaction even though it itself is not consumed or used up in the course of the reaction.

3. A catalyst makes the reaction faster by providing an alternative pathway with a lower activation energy.

4. A catalyst is reaction-specific. It may not be effective in another reaction even if the two reactions are of similar type.

5. In a reversible reaction, a catalyst accelerates both the forward and the reverse reactions. So, the inclusion of a catalyst does not alter the equilibrium constant of a reversible reaction.

kherson [118]4 years ago

5 0

Explanation:

a catalyst is a substance that changes the rate of reaction. there are three types organic or biocatalyst (enzymes), heterogeneous catalysts and homogeneous catalyst but it remains unchanged after the reaction.

properties:

it remains unchanged after the reaction.
it is ph specific
it is reaction specific
it improves the product yield

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the specific heat of iron is 0.4494 j/g°C. how much heat energy (kj) is transferred when a 24.7 kg iron ingot is cooled from 880

guapka [62]

Answer is: 9623.85 kJ of heat is transferred from iron ingot.
m(Fe) = 24.7 kg · 1000 g/kg = 24700 g; mass of iron ingot.
C = 0.4494 J/g°C; the specific heat of iron
ΔT = 880°C - 13°C; temperature difference.
ΔT = 867°C.
Q = m·C·ΔT.
Q = 24700 g · 0.4494 J/g°C ·867°C.
Q = 9623856.06 J ÷ 1000J/kJ.
Q = 9623.85 kJ.

8 0

4 years ago

H2(g) + CO2(g) + 10 kcal H2O(g) + CO(g)

EleoNora [17]

Answer: The equilibrium constant for the given reaction is 0.8

Explanation:

Equilibrium constant is defined as the ratio of concentration of the products raised to the power its stoichiometric coefficients to the concentration of reactants raised to power its stoichiometric coefficient. It is represented as $K_c$

For the general equation:

$aA+bB\rightleftharpoons cC+dD$

The equilibrium constant is represented as:

$K_c=\frac{[C]^c[D]^d}{[A]^a[B]^b}$

For the given chemical equation:

$H_2(g)+CO_2(g)+10 kcal\rightleftharpoons H_2O(g)+CO(g)$

$K_c$ for this equation is given by:

$K_c=\frac{[H_2O][CO]}{[H_2][CO_2]}$

Concentration at equilibrium of

$H_2=2mol/L\\H_2O=4mol/L\\CO_2=5mol/L\\CO=4mol/L$

Putting values in above equation, we get:

$K_c=\frac{4\times 4}{2\times 5}\\K_c=0.8$

Hence, the equilibrium constant for the given chemical reaction is 0.8

6 0

3 years ago

Read 2 more answers

The only way to observe a chemical property, is by reacting the substance with something else, which changes it into something n

lozanna [386]

Answer:

yes

Explanation:

pls mark me brainliest right

3 0

3 years ago

5. How many mm are equal to 4.75 x 10-2 m?

liq [111]

Answer:

47.5 mm are equal to 4.75 × 10⁻² m.

Explanation:

Meter and millimeter both are units of length. Millimeter is smaller unit while meter is larger unit. The one meter consist of thousand millimeter or we can say that one thousand millimeters are equal to one meter. In order to convert the meter value into millimeter we have to multiply the values with thousand.

we know that one meter is equal to 1000 millimeter.

1 m = 1000 mm

4.75 × 10⁻² × 1000 = 47.5 mm

47.5 mm are equal to 4.75 × 10⁻² m.

6 0

3 years ago

Which law was used to determine the relationship between the volume and the number of moles in this equation?

gtnhenbr [62]

Answer:

Avogadro's law states that ''equal volumes of all gases, at the same temperature and pressure, have the same number of molecules.

Explanation:

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3 years ago