Molecular Physics | Thermodynamics Answers

The potential energy of a system of two atoms is given by the expression, 𝐔 = −𝐀 𝐫 𝟑 + 𝐁 𝐫 𝟖 A stable molecule is formed with release of 10 eV of energy when the interatomic distance is 3 A°. Determine the force needed to dissociate this molecule into atoms and the interatomic distance at which the dissociation occurs

An audio speaker producing a steady sound at an outdoor concert is 18 ft away from you. If you move to a position where the speaker is 67 ft distant, by what factor will the amplitude of the sound change?

The mercury-in glass thermometer has the ice and steam pint as 6cm and 31cm respectively. Calculate the height of the Mercury when the temperature is 60°

The resistance 𝑅𝜃 of a particular resistance thermometer at a Celsius temperature 𝜃 as measured by a constant-volume gas thermometer is given by

𝑅𝜃 = 50.00 + 0.1700𝜃 + 3.00 × 10−4𝜃2.

Calculate the temperature as measured on the scale of the resistance thermometer which corresponds to a temperature of 60°𝐶 on the gas thermometer.

A cook puts 9.00 g of water in a 2.00-L pressure cooker that is then warmed to 500^oC . What is the pressure inside the container? 

What is delta S, the change in entropy of ten moles of an ideal monatomic gas that is expanded slowly and isothermally at a temperature of 293K from a pressure of 2 atm to a pressure of 1 atm?

a) 57.6 J/K

b) 203.4 J/K

c) 21.7 J/K

Two systems have thermodynamic probabilities of 3.0 * 10^27 and 1.8 10*28 respectively calculate the entropies of the individual systems as well as their in composite systems and verify the boltzsmen relation

A Carnot engine has an efficiency of 50% when it sinks temperature is at 27 degree celcius calculate the change in source temperature for increasing its efficiency to 60%