Molecular Physics | Thermodynamics Answers

At what temperature on the Fahrenheit scale will the temperature on a centigrade scale be
three times that on a Fahrenheit scale?

150g of ice at 0°c is mixed with 300g of water at 50°c.calculate the temperature of the mixture.Take specific heat capacity of water as 4.2×10^3J/Kg/k (specific latent heat of fussion of ice as 3.34×10^5J/Kg/k

Some hydrogen gas has a volume of 200cm3 at 150c. If the pressure remain constant at what temperature will its volume be 150cm3?

An iron rail is 20m long. How much will it expand when heated from 100c to 500c (linear expansivity of Iron = 1.2x10-5 0c-1)

We want to condense 1 kg of water vapour at 100 c to a temperature of -5 c (Ice). How much heat should be removed?

Suppose water clusters containing up to 50 molecules. If we add 500 water
molecules at 0c with 500 water molecules forming ice at 0c.

(a) The heat flow would be from ice to water or water to ice.
(b) Which thermodynamic property directed the heat flow for the above situation.
(c) Justify the heat flow direction from Boltzmann entropy equation.

Heat supplied to raise steam in the boiler is 3000 KJ/kg while heat rejected by the system to
the cooling water in the condenser is 2000 KJ/kg. The turbine develops power of 1500 KW and
the work required to pump the condensate back into the boiler is 50 KW.

A kettle transfers 6000 J of energy electrically. 1500 J of this is wasted. What is the efficiency of this kettle?

The volume of a small piece of metal is 5.000cm3 at 200C and 5.014cm3 at 1000C. Determine the cubic expansivity of the metal?

What substance can gain 40.0 KJ and only gain 25 C if 1.616 kg of the substance is present?