Helium effuses through a small opening at a rate of 1×10^–9 mol s–1. An unknown gas at the same temperature and pressure is found to...

10 L of a gas at constant pressure is initially at 25°C. If the temperature is increased to 50°C the volume of the gas will a. increase...

Find Ion With The Smallest Radius

Calculate the fuel value of C6H14, given that ΔH °comb = –4163 kJ/mol. The molar mass of C6H14 is 86.18 g/mol. –4163 kJ/mol * 1mol = -...

Calculate ΔE for the combustion of a gas that releases 235 kJ of energy to its surroundings and does 92.5 kJ of work on its...

What happens to the magnitude and sign of the enthalpy change when a process is reversed? When a process is reversed, the enthalpy(ΔH)...

A snack bar contains 159 Calories. What is the energy value in terms of joules, the SI unit of energy? 1 calorie = 4.184 joules 159 ...

The rate of a reaction can be expresses in terms of a change in the amount of reactants or products over an interval of time. Let's take...

A cylinder of compressed He originally has a pressure of 20 atm and a volume 10 L at a temperature of 25°C. It is used to fill 10, 1 L...

The equilibrium constant Kp of the Haber reaction, N2 (g) + 3 H2(g) ⇌ 2 NH3 (g), at 200C is 6.78 × 105. Initially, 0.0020 moles N2, 0.010...