Find the temperature at which Kp = 42.0 for the reaction

H2(g) + I2(g) → 2HI(g)

[Given: at 25°C, for H2(g), ∆H°f = 0, S° = 131.0 J/mol·K; for I2(g), ∆H°f = 62.26 kJ/mol, S° = 260.6 J/mol·K; for HI(g), ∆H°f = 25.9 kJ/mol, S° = 206.3 J/mol·K; assume that ∆H° and ∆S° are independent of temperature.]

Temperature for the given reaction is 1040 K (approx).

Explanation:

Formula for enthalpy change of a reaction is as follows.

For the given reaction equation,

Now, putting the given values into the above formula as follows.

                    = -10460 J/mol

Now, we will calculate the change in its entropy as follows.

                       =

                       =

                       = 21 J/mol

Also, we know that

                     T = 1036.7 K

                        = 1040 K

Therefore, we can conclude that temperature for the given reaction is 1040 K (approx).

plasma is the state of matter where the substance is ionized and has no definite shape or volume. the fact of being ionized makes the substance a good electrical conductor.

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.