Molecular Physics | Thermodynamics Answers

In a isothermal process temperature remains constant. According to first law of thermodynamics Q=W+∆U. here ∆U is internal energy. For ideal gas ∆U is function of temperature only hence ∆U=0 for isothermal process. Hence we get Q=W for isothermal process. But according to kelvin-planck statement of second law of thermodynamics heat is not completely convertible into work. Then how this Q=W is possible for isothermal process.

By using the ideal gas equation of state, show that change in the internal energy of the same quantity of an ideal gas in adiabatic process is given by
dU= -NRTlnV

An insulated tank initially contains 0.25 kg of a gas with an internal energy of 200 KJ/kg. Additional gas with an internal energy of 300 KJ/kg and an enthalpy of 400 KJ/kg enters the tank until the total mass of the gas contained is 1 kg. The final internal energy (in KJ/kg) of the gas in the tank is ?
a) 250
b) 275
c) 350
d) None of these

Please provide explaination to answer

Q.1 choose correct option
a) Only heat can cross the boundary of control surface.
b) Heat and Work can cross the boundary of control surface.
c) Mass as well as heat and work can cross the boundary of control surface.
d) None of these.

The height of a water fall is 40 meter.Assuming adiabatic conditions,estimate temperature difference between top and bottom.

What type of materials is suitable for measuring scale

A student claims that the length of rod is longer in winter that of summer

What are the factors hasting or retadening this process A). sublimation.
B). Evaporation

Define the term mechanical equivalent of heat. How is it different or similar to mechanical work?

What I's the heat Capacity of 100g of copper calorimeter