3 years ago

(i need help please ill give brainliest if u get it right)* the questions and everything are in the picture below*

1 answer:

NemiM [27]3 years ago

7 0

Explanation:im not really sure about this one but i think it is either c or b

ANSWER:C im pretty sure.sorry if wrong

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maw [93]

Answer: d) -705.55 kJ

Explanation:

Heat of reaction is the change of enthalpy during a chemical reaction with all substances in their standard states.

$2CO_2(g)+2H_2O(l)\rightarrow C_2H_4(g)+3O_2(g)$ $\Delta H=+1411.1kJ$

Reversing the reaction, changes the sign of $\Delta H$

$C_2H_4(g)+3O_2(g)\rightarrow 2CO_2(g)+2H_2O(l)$

$\Delta H=-1411.1kJ$

On multiplying the reaction by $\frac{1}{2}$ , enthalpy gets half:

$0.5C_2H_4(g)+1.5O_2(g)\rightarrow CO_2(g)+H_2O(l)$ $\Delta H=\frac{1}{2}\times -1411.1kJ=-705.55kJ/mol$

Thus the enthalpy change for the given reaction is -705.55kJ

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3 years ago

marissa [1.9K]

I think it's True hope it helps

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3 years ago

julsineya [31]

10 hectometers

One hectometer is 100 meters in length already, so 10 is 1000

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3 years ago

tensa zangetsu [6.8K]

Answer:

I think the answer is B.

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3 years ago

raketka [301]

Answer:

Explanation:

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2 years ago