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4 years ago

List 2 everyday examples for decanting centrifuge filtration

1 answer:

7 0

Answer:decanting is done when decanting the liquid before using mustard in order to make a less messy hotdog,when frying hamburger meat for spaghetti source you decant the grease from the pan

filtration is used in heating,ventilation,air conditioning systems at home in order to remove particles and somites odours and chemicals

Explanation:

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Given these reactions, where X represents a generic metal or metalloid 1 ) H 2 ( g ) + 1 2 O 2 ( g ) ⟶ H 2 O ( g ) Δ H 1 = − 241

anygoal [31]

Answer : The enthalpy of the given reaction will be, -1048.6 kJ

Explanation :

According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.

The main reaction is:

$XCl_4(s)+2H_2O(l)\rightarrow XO_2(s)+4HCl(g)$ $\Delta H=?$

The intermediate balanced chemical reactions are:

(1) $H_2(g)+\frac{1}{2}O_2(g)\rightarrow H_2O(g)$ $\Delta H_1=-241.8kJ$

(2) $X(s)+2Cl_2(g)\rightarrow XCl_4(s)$ $\Delta H_2=+461.9kJ$

(3) $\frac{1}{2}H_2(g)+\frac{1}{2}Cl_2(g)\rightarrow HCl(g)$ $\Delta H_3=-92.3kJ$

(4) $X(s)+O_2(g)\rightarrow XO_2(s)$ $\Delta H_4=-789.1kJ$

(5) $H_2O(g)\rightarrow H_2O(l)$ $\Delta H_5=-44.0kJ$

Now reversing reaction 2, multiplying reaction 3 by 4, reversing reaction 1 and multiplying by 2, reversing reaction 5 and multiplying by 2 and then adding all the equations, we get :

(1) $2H_2O(g)\rightarrow 2H_2(g)+O_2(g)$ $\Delta H_1=2\times 241.8kJ=483.6kJ$

(2) $XCl_4(s)\rightarrow X(s)+2Cl_2(g)$ $\Delta H_2=-461.9kJ$

(3) $2H_2(g)+2Cl_2(g)\rightarrow 4HCl(g)$ $\Delta H_3=4\times -92.3kJ=-369.2kJ$

(4) $X(s)+O_2(g)\rightarrow XO_2(s)$ $\Delta H_4=-789.1kJ$

(5) $2H_2O(l)\rightarrow 2H_2O(g)$ $\Delta H_5=2\times 44.0kJ=88.0kJ$

The expression for enthalpy of main reaction will be:

$\Delta H=\Delta H_1+\Delta H_2+\Delta H_3+\Delta H_4+\Delta H_5$

$\Delta H=(483.6)+(-461.9)+(-369.2)+(-789.1)+(88.0)$

$\Delta H=-1048.6kJ$

Therefore, the enthalpy of the given reaction will be, -1048.6 kJ

4 0

3 years ago

Which compound is soluble in water PbS BaS Na2S Fe2S3

Dmitry [639]

Answer:

The answer to your question is Na₂S, if you need to choices the other one is BaS

Explanation:

As a general rule, all the compounds that have sulfur, are insoluble in water, but the are some exceptions.

-Molecules with ammonia

-If the molecule has alkali metals is soluble

-If the molecule has Ca⁺², Sr⁺² and Ba⁺² is soluble in water.

From the compounds given, following the rules, the compound that is soluble in is Na₂S and perhaps BaS.

5 0

3 years ago

4 5 Is water an acid, alkali or neutral? Give the reason for your answer.

Sergio039 [100]

Answer:

Acid.

Explanation:

I assume you mean 4.5?

pH below 7 is acidic

pH above 7 is alkaline

pH equal to 7 is neutral

4.5 lies below 7, so it is acidic

4 0

2 years ago

64g of sulfur dioxide (SO2) contains 32g of oxygen. Calculate how much sulfur it contains?

KengaRu [80]

Mass of SO2 = mass of sulfur+ mass of oxygen
⇒ 64 g= mass of sulfur+ 32 g
⇒ mass of sulfur= 64 g-32 g
⇒ mass of sulfur= 32 g.

There is 32 g of sulfur in 64 g of SO2~

6 0

3 years ago

A reaction will be spontaneous at all temperatures if the reaction???

lisabon 2012 [21]

D is endothermic and

6 0

3 years ago