Molecular Physics | Thermodynamics Answers

What is the quantity of heat required to change 0.02 kg of ice at 0 oC to water at 60 oC ?

[ specific heat capacity of water = 4.2 x 10^3 J kg^-1 o C^-1 ]

[ specific latent heat of fusion of ice = 3.34 x 10^5 J kg^-1 ]

Protons of mass m = 1.67 × 10−24 g and moving with a velocity v = 2×107 m/s strike a target of total mass M = 1g and heat capacity C = 0.334 cal/g/K; the proton beam carries a total current I = 4.8 μA. If 1/3 of the beam energy is converted into heat, calculate the temperature variation of the target in a time interval ∆t = 1 s.

0.05kg of steam at 10 bar, dryness fraction of 0.84 is heated reversibly in a rigid vessel until the pressure is 20 bar. Calculate the change in the total entropy, the heat supplied and the average temperature at which heat is added. Show the area which represents the heat supplied on a T-s diagram 

The air temperature is 50 degree celsius .water cools from 100 degree celsius to 75 degree celsius in 5minutes.how long will it take for the water to cool to 10 degree celsius

A themometer has mercury filled glass bulb with a volume of 2^10-7 m3 attached to a thin glass capillary tube an inner diameter of 0.1 mm .if the temperature increases by 100K ,calculate how far will the mercury rise in the tube.

A solid gold vase of mass 20.0 kg is suspended by a rope at sea bottom. What is the Buoyant 

Force of the seawater on the vase?

14. A dime has a diameter of 1.8000 cm at 20C. The dime is made of mostly zinc, for which the 

coefficient of linear expansion is 2.6 10 −5C−1.  

(a) What would its diameter be on a hot day at 48.0C?  

(b) What is its diameter on a cold night at −53.0C?