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Valentin [98]
3 years ago
14

Which statement is true if the Hrxn of a reaction is positive?

Chemistry
2 answers:
erma4kov [3.2K]3 years ago
7 0
I think it is b..................................................
iren2701 [21]3 years ago
3 0

<u>Answer:</u> The correct answer is Option A.

<u>Explanation:</u>

Endothermic reactions are defined as the reactions in which potential energy of the reactants is less than the potential energy of the products. The total enthalpy change of the reaction (\Delta H_{rxn}) comes out to be positive. Energy is absorbed during this reaction.

\Delta H_{rxn}=\Delta H_{products}-\Delta H_{reactants}=+ve

Exothermic reactions are defined as the reactions in which potential energy of the products is less than the potential energy of the reactants. The total enthalpy change of the reaction (\Delta H_{rxn}) comes out to be negative. Energy is released during this reaction.

\Delta H_{rxn}=\Delta H_{products}-\Delta H_{reactants}=-ve

From the above information, the correct answer is Option A.

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Explanation : Given,

Volume = 40.5 mL

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First we have to calculate the mass of liquid (chloroform).

Mass of liquid = Mass of cylinder and liquid - Mass of cylinder

Mass of liquid = 145.10 g - 85.6 g

Mass of liquid = 59.5 g

Now we have to calculate the density of liquid (chloroform).

Formula used:

Density=\frac{Mass}{Volume}

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