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Svetllana [295]
3 years ago
11

What is the overall enthalpy change DHrxn for the system?

Chemistry
2 answers:
Y_Kistochka [10]3 years ago
6 0

Your answer is 300 kJ

hope this helps! (:

damaskus [11]3 years ago
4 0

<u>Answer:</u> The overall enthalpy for the system is -1300 kJ.

<u>Explanation:</u>

Enthalpy change of the reaction is defined as the difference in the potential energy of the products and the potential energy of the reactants. This is represented as \Delta H_{rxn}

The equation used to represent enthalpy change of the reaction follows:

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

where,

\Delta H_{products} = potential energy of the products = [(-200) + (-300)]kJ = -500kJ

\Delta H_{reactant} = potential energy of the reactants = 800kJ

Putting values in above equation:

\Delta H_{rxn}=[-500-(800)]kJ=-1300kJ

Hence, the overall enthalpy for the system is -1300 kJ.

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Chlorine has two isotopes, 35Cl and 37Cl that have the respective percent abundance's of 75.77% and 24.23% and masses of 34.9688
AnnyKZ [126]

Answer:

The answer to your question is  35.4527 g

Explanation:

Data

Cl-35    abundance = 75.77 %    mass Cl-35 = 34.9688

Cl-37     abundance = 24.23 %   mass Cl-37 = 36.9659

Process

1.- Convert the percents to decimals

   75.77% = 75.77/100 = 0.7577

   24.23% = 24.23/100 = 0.2423

2.- Find the atomic weight

    Average atomic weight = Abundance 1 x Mass Cl-35 +

                                               Abundance 2 x Mass Cl-37

Substitution

     Average atomic weight = (0.7577)(34.9688) + (0.2423 x 36.9659)

Simplification

     Average atomic weight = 26.4959 + 8.9568

Result

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3 0
3 years ago
Which organisms in this food web are carnivores? Select the two correct
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The two correct options are Poison dart frog and Boa constrictor. Both these organisms are pure carnivores which are also known as pure meat eaters in the food web. Carnivores are organisms in the food chain that only meat-eaters and never take any type of vegetation in their diet.

Explanation:

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6 0
4 years ago
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