Zadania z chemii IB HL

Znalezionych zadań: 3

Filtry i umiejętności1

(i) Calculate, in $\mathrm{kJ\,mol^{-1}}$

, the standard enthalpy change of this hydrogenation reaction using the enthalpy of combustion data in section 14 of the data booklet. (ii) The standard entropy change for this reaction is…

A reaction is spontaneous at low temperatures but becomes non-spontaneous when the temperature is raised. Which combination of signs of $\Delta H$ and $\Delta S$ is consistent with this behaviour? A. $\Delta H > 0$ and $\Delta S > 0$ B. $\Delta H < 0$ and…

(i) Calculate the enthalpy change, $\Delta H$ , for the overall synthesis of propyl ethanoate from propane and ethane shown above. Use section 12 of the data booklet. (ii) Two students each calculated the enthalpy change for the reaction between propan-1-ol and…