Calculate the standard entropy change for the following reaction. 4 Al(s) + 3 O2(g) → 2 Al½O3(s) JK-!

Calculate the standard entropy change for the reaction at 25 °C. Standard molar entropy values can be found in this table.   HCl(g)+NaOH(s)⟶NaCl(s)+H2O(l) Δ?∘rxn=

a) Briefly describe the Third Law of Thermodynamics.   b) Consider the reaction 2X(g)+ O2(g)→3Y(g) carried out at 25°C and 1 atm. Calculate ΔHrxn°, ΔSrxn°, and ΔGrxn° using the following data. Identify whether the reaction is spontaneous or not. (Assume all gases are perfect).   Substance DHfo (kJ/mol) So(J/k mol) X  (g) -250 250 Y (g) -300 280 O2 (g) 0 205     c) In a reaction, A + B → Product, rate is doubled when the concentration of B is doubled, and rate increases by a factor of 8 when the concentrations of both the reactants (A and B) are doubled. Choose the correct rate law for the reaction from below. Explain your answer briefly.   Rate = k[A][B] Rate = k [A][B]2 Rate = k [A]2[B] Rate = k [A][B]3 d) One mole of N2(g) occupies 5 L of volume at 300 K in a sealed cylinder. The gas behaves ideally in expanding isothermally to 10 L. Calculate w, ΔE and ΔH if the expansion proceeds (i) reversibly, (ii) irreversibly against an external pressure at…

Given the following reaction: 9C (s) + 12H2 (g) + 3/2 O2 (g) → 3C3H7 OH (1) If the enthalpy change is -954 kJ and entropy increases: blank 1: is the reaction exothermic or endothermic? blank 2: is the reaction spontaneous or non-spontaneous?