Consider the reaction , for which ΔH ° = +77.2 kJ/mol. Which of the following statements regarding its temperature dependence is true?

Determine the vapor pressure of a solution at 25°C that contains 76.6 g of glucose (180.156 g/mol) in 250.0 g of water. The vapor pressure of pure water at 25°C is 23.8 torr.

What is the pH of a 0.100 M NH3 solution that has Kb = 1.8 × 10-5? The equation for the dissociation of NH3 is NH3(aq) + H2O(l) ⇌ NH4+(aq) + OH-(aq).

A 25 mg sample of wood produced 3072 β− particles from carbon-14 in 3 hours, while a 25 mg sample of fresh wood produced 9216 β− particles in the same period of time. The half-life of carbon-14 is 5730 years. How old is the wood from the archaeological site?

Consider the following reaction at equilibrium. What effect will reducing the volume of the reaction mixture have on the system? CuS(s) + O2(g) ⇌ Cu(s) + SO2(g)

Place the following in order of decreasing standard molar entropy.

If the half-life of tritium is 12.26 years, what percentage of the original quantity of the isotope is left in a sample after 20.0 years?

Suppose 67.5% of a sample of radioactive sodium-24 has decayed after one day. Estimate the half-life of Na-24.

Place the following in order of increasing molar entropy at 298 K. NO CO SO

Consider the following reaction at equilibrium. What effect will adding some C have on the system? CO2(g) + C(graphite) ⇌ 2 CO(g)