In the following balanced reaction: 2Al(s) + 6HCl(aq) → 2AlCl3(s) + 3H2(g) 2.32 g of Al react with excess HCl to produce hydrogen gas which is passed through water and collected at 25oC and a barometric pressure of 7.40 x 102 Torr. The vapour pressure of water at 25oC is 23.770 Torr. Calculate the root-mean-squared velocity of the hydrogen gas molecules at this temperature.

What mass of H2 gas can be collected over water from a 250-mL flask at a temperature of 25ºC and a pressure of 105.325 kPa? (The vapour pressure of H2O at these conditions is 3.169 kPa.)

A gas follows the equation state: p=RT/V_m - a/(V_m^2 ) and the strength of intermolecular interaction a > 0. Answer the following questions. (a) Derive the expression (∂p/(∂V_m ) )_T in terms of R, T, a, and/or Vm.  (b) Derive the expression (∂p/∂T )_(V_m ) in terms of R, T, a, and/or Vm.  (c) Which of the above partial derivatives ((∂p/(∂V_m ) )_T and (∂p/∂T )_(V_m )) CANNOT have a negative value? Note that temperature is in Kelvin scale, and temperate cannot go below 0 K. (d) Can the pressure p in the above equation of state be a state function? Namely, is the total differential dpexact? Show your detailed derivation.

A 10.0 mL sample of CO2 is collected by the downward displacement of water at 23.0°C and a room pressure of 100.5 kPa. What is the volume of dry CO2 at 0.00°C and 90.0 kPa?

The Gibbs free energy of a mixture of solid A and B (a phase) is given as 10,000X4XB + RT (XĄ In XA + Xg ln XB)- AGmix A· А А (a) When AH is positive, phase separation can occur. The composition range where phase separation occurs is defined by the common tangent rule. Derive an expression for the relationship between Tand X8 that defines the composition and temperature range where phase separation occurs. Hint: assume the AHmix versus composition curve is symmetrical in this case. (b) Plot the phase diagram T (y-axis) versus XB (x-axis) over the temperature range from 300 K

One of the most recognizable corrosion reactions is the rusting of iron. Rust is caused by iron reacting with oxygen gas in the presence of water to create an oxide layer. Iron can form several different oxides, each having its own unique color. Red rust is caused by the formation of iron(III) oxide trihydrate. Fe,O, • 3 H,O Write the balanced reaction for the formation of Fe, O, • 3 H,O(s). Phases are optional. reaction: Fe + 6H,O + 30, Fe(OH)3 > Incorrect

The partial pressure of water vapour at 30.0 °C is 4.25 kPa. What is the maximum mass of water that can be present in vapour form in a 243 m3 room at the indicated temperature?