Physical Chemistry Answers

The maximum number of phases in a quartenary system at atmospheric pressure are

One mole of an ideal gas expands reversibly from a volume of 5 dm^3 and temperature of 25 °C to a volume of 10 dm^3 and temperature of -23 °C. Calculate the entropy change accompanying the process. (Assume C v= 1.5R, R= Universal gas constant).

For the reaction

N₂O₄(g) ⇔ 2NO₂(g)

K_P = 1.4×10⁴Pa at 303K. To find the value of K_c at this temperature.

Calcium carbonate, CaCO 3 when heated to calcium oxide (Cao) and carbon dioxide (CO 2 ) . Ir 100 g of calcium carbonate is allowed to decompose, 56 g of calcium oxide is producedWhat mass of carbon dioxide is produced by the decomposition? g

The following kinetic data (𝑣0 is the initial rate) were obtained for the reaction: 2𝐼𝐶𝑙(𝑔) + 𝐻2(𝑔) → 𝐼2(𝑔) + 2𝐻𝐶𝑙(𝑔) Experiment [𝐼𝐶𝑙]0 (𝑚𝑚𝑜𝑙. 𝑑𝑚−3 ) [𝐻2]0 (𝑚𝑚𝑜𝑙. 𝑑𝑚−3 ) 𝑣0 (𝑚𝑚𝑜𝑙. 𝑑𝑚−3 ) 1 1.5 1.5 3.7 x 10-7 2 3.0 1.5 7.4 x 10-7 3 3.0 4.5 22 x 10-7 4 4.7 2.7 ? (a) Write the rate law for the reaction [2] (b) From the data, determine the value of the rate constant [2]

A gas has a pressure of 699.0 mmHg at 40 degrees celsius. If the container is 3L, how many moles of gas are present?

A tray of water is placed under the sun on a warm day and freeze.

How many moles of NO₂ would result from mixing 1.5 mole of N₂ with 2.5 moles of O₂?

    N₂  +  2 O₂ ---->  2 NO₂

predict NMR specrum of CH2Cl-CHCl2

Complete the following sentences

For a process, If

1. ∆G<0 (at constant pressure) the process will always will be ______________

2. ∆G > 0, the process will always will be____________________

3. ∆G = 0, the process will always will be____________________

4. ∆S<0 (at constant pressure) the process will always will be ______________

5. ∆S > 0, the process will always will be____________________

6. ∆S = 0, the process will always will be____________________