At constant pressure and temperature, which statement is true?

For the reaction 3 C2H2(g) → C6H6(l) at 25°C, the standard enthalpy change is -631 kJ and the standard entropy change is -430 J/K. Calculate the standard free energy change at 25°C.

Which of the following are unstable with respect to their constituent elements at 25°C?

Calculate the standard free energy for the reaction given. 2 CH3OH(l) + 3 O2(g) → 2 CO2(g) + 4 H2O(l)

Consider the reaction:N2(g) + 3 F2(g) → 2 NF3(g) ΔH° = -249 kJ and ΔS° = -278 J/K at 25°CCalculate ΔG° and state whether the equilibrium composition should favor reactants or products at standard conditions.

For bromine, ΔH°vap = 30.91 kJ/mol and ΔS°vap = 93.23 JK-1mol-1 at 25°C. What is the normal boiling point for bromine?

Consider a buffered solution consisting of H2CO3 and HCO3- where the pKa = 6.4. At pH = 6.4, which of the following is true?

If the molar solubility of the compound Al2O3 is 7.0 × 10–6 M, what is the Ksp for this compound?

Classify each of the following processes as spontaneous or nonspontaneous.I. H2O(l) → H2O(g) T = 25°C, vessel open to atmosphere with 50% relative humidityII. H2O(s) → H2O(l) T = 25°C, P = 1 atm

The Navigation Act 1663 did the following…