According to the Following Reaction, How Much Energy Is Evolved

question 125

Multiple Choice

According to the following reaction, how much energy is evolved during the reaction of 2.50 L B₂H₆ and 5.65 L Cl₂ (both gases are initially at STP) ? The molar mass of B₂H₆ is 27.67 g . B₂H₆(g) + 6Cl₂(g) → 2BCl₃(g) + 6HCl(g) H° = -1396 kJ

• A) 57.8 kJ
• B) 156 kJ
• C) 215 kJ
• D) 352 kJ
• E) 508 kJ

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Definitions:

Altruism

Social interaction that has the potential to decrease the lifetime reproductive success of the member exhibiting the behavior.

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A social structure within a group of animals where individuals are ranked according to their level of dominance or power.

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Chemical signals released by an organism that influence the behavior or physiology of other members of the same species.

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The use of chemical signals between organisms, which can regulate behavior, identify individuals or species, and signal threats or resources.