please answer ALL the questions. if you want to answer one question only, please
ID: 103999 • Letter: P
Question
please answer ALL the questions. if you want to answer one question only, please don’t. let someone answer all of it.I don’t need explanation
I just need the correct answer
thanks
10. of the following reactions? Which of the following is true concerning 3) evpansion work is performed. ie. l (E) none of the above are true for both reactions enthalpies of formation of Al,oO, and B.O, are -1676 and 1274 J mol respectively D these data indicate the rate of oxidation of Al and B? (A) Yes (B) No (C) Cannot say 12. Which one of the following reactions reacts the most rapidly at room temperature (A) (B) (C) (D) 2H2 + O2 2 H,O H. + OH H2O (neutralization) Ci2HnO" (sugar) 12 C + 1 1 H,O H·OH HO (radical reaction) 13. Gases can be liquefied using a two-step process: a compression followed by an expansion During the compression, energy is transferred from the gas as heat, however, during the expansion, the temperature of the gas is lowered. Which of the following combinations satisfies the requirements for gas liquefaction? (A) isothermal compression followed by an adiabatic expansion (B) isentropic compression followed by an adiabatic expansion (C) adiabatic compression followed by an isentropic expansion (D) isobaric compression followed by an isothermal expansion (E) adiabatic compression followed by a isobaric expansiorn 14 You store food in a fridge to prevent spoilage. Which factor are you applying to slow the rate of reaction? (A) nature of reactants (B) isolation of reactants (C) avoid catalysts (D) temperature IS. A system is transformed betwoen two states. Its entropy change AS- da T if (A) It is a closed system (B) The transformation is reversible (C) The temperature is constant D) The process is spontancous
Explanation / Answer
Ans 10 :E) None of the above are true for both the reactions
The entropy change is negative for the first and positive for the second reaction , and also the work done is not positive in both the cases. The enthalpy change of the reaction is not equal to the internal energy change of the system , as the work done is obviously not 0. So none of the choices match both of the reactions correctly.
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