All categories

2 years ago

Part E

Chemistry

1 answer:

patriot [66]2 years ago

3 0

Answer:

Could you please tell me what is the question? I don't get the question

You might be interested in

What chiefly determines the polarity of a bond?

Rufina [12.5K]

Using electronegative. If the difference is between 0 and .4, the bond is nonpolar,If the difference is between .4 and about 1.9, the bond is polar, and if the difference is over 1.9 it is typically ionic.

3 0

3 years ago

Determine the enthalpy change for the reaction 2C(s) + 2H2O(g) → CH4(g) + CO2(g) using the following:

Sophie [7]

Answer : The enthalpy change for the reaction is, 97.7 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.

According to this law, the chemical equation can be treated as ordinary algebraic expression and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.

The given main chemical reaction is,

$2C(s)+3H_2O(g)\rightarrow CH_4(g)+CO_2(g)$ $\Delta H=?$

The intermediate balanced chemical reaction will be,

(1) $C(s)+H_2O(g)\rightarrow CO(g)+H_2(g)$ $\Delta H_1=131.3kJ$

(2) $CO(g)+H_2O(g)\rightarrow CO_2(g)+H_2(g)$ $\Delta H_2=41.2kJ$

(3) $CH_4(g)+H_2O(g)\rightarrow 2H_2(g)+CO(g)$ $\Delta H_3=206.1kJ$

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

(1) $2C(s)+2H_2O(g)\rightarrow 2CO(g)+2H_2(g)$ $\Delta H_1=2\times 131.3kJ=262.6kJ$

(2) $CO(g)+H_2O(g)\rightarrow CO_2(g)+H_2(g)$ $\Delta H_2=41.2kJ$

(3) $2H_2(g)+CO(g)\rightarrow CH_4(g)+H_2O(g)$ $\Delta H_3=-206.1kJ$

The expression for enthalpy of main reaction will be,

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

$\Delta H=(262.6)+(41.2)+(-206.1)$

$\Delta H=97.7kJ$

Therefore, the enthalpy change for the reaction is, 97.7 kJ

3 0

4 years ago

Read 2 more answers

This rock is made up of the mineral calcite and it formed from the remains of organisms that lived in water. What type of rock i

olchik [2.2K]

Answer:

sedimentary rock

Explanation:

Sedimentary rocks are formed from pre-existing rocks or pieces of once-living organisms. And as you said "it formed from the remains of organisms that lived in water". And that makes it a sedimentary rock.

Hope this helped!

Have a supercalifragilisticexpialidocious day!

7 0

3 years ago

HELP PLEASE

muminat

Answer:

I think B is the answer so hope

6 0

3 years ago

Read 2 more answers

Cheese is an example of Solid in gas colloid Liquid in gas colloid Solid in liquid colloid Liquid in solid colloid

Genrish500 [490]

The solution in which the solute particles are suspended in a liquid (fluid) is called colloidal solution. Colloid is a solution that has particles ranging between 1 and 1000 nanometres. Cheese is a solid emulsion in which liquid is solute and solid is solvent. Hence, cheese is colloidal solution of liquid in solid.

7 0

3 years ago