LON-CAPA The Learning × ? c?. Secure https://capachemtamuedu/res/tamunsbrown/Set

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LON-CAPA The Learning × ? c?. Secure https://capachemtamuedu/res/tamunsbrown/Set8/Set8 page#13 3. The enthalpy diagram below depicts a chemical in letters corresponding to ALL of the true statements (A, CE, BDF, etc.) I reaction involving the generic substances A2,82, and AB. Which of the statements that follow are true for this reaction A2+ B2 2 AB A) If the reaction were carried out in an insulated container, the system would get colder B) ?H for the reaction is negative. C) The reaction is endothermic. D) The reacting system releases heat to the surroundings. E) AB is a reactant. F) A2 is a reactant are not sure about these, you should review the concepts of exothermic and endothermic reactions Submit Answer Incorrect. Tries 1/99 Previous Tries ? n L ndhei che-da- 40 C, The 4, How much energy is needed to warm 125 mL of water lat ut l cup) from 21 6C Type here to search

Explanation / Answer

From the graph,

the chemical equation we can write as below,

2AB ------> A2 + B2

so AB is the reactant and A2 and B2 are the products,

since dH for AB is lower compare to dH of A2 and dH of B2 so, the reaction is said to be endothermic reaction.

so the reaction were carried out in an insulated container, the sysytem would get colder. and heat energy is absorbed by the system.

hence the answer : ACE

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