Molecular Physics | Thermodynamics Answers

A system consists of a gas inside a cylinder. Inside the cylinder there is a 10 ohm resistor connected to an electrical circuit through which a current can pass. A mass of 0.1kg is placed on the piston which drops by 0.2 m and comes to rest. A current of 0.1 A is passed through the 10 ohm resistor for 2s. What is the change in the internal energy of the system when it has reached equilibrium?

An ideal refrigerator-a Carnot engine running backwards-freezes ice-cubes at a rate of 5gs-1 starting with water at its freezing point. Energy is given off to the room which is at 30°C. The fusion energy of ice is 320Jg-1. At what rate must electrical energy be supplied as work, and at what rate is energy given off to the room

1mole of oxygen initially at 7°c adiabatically compressed so that its pressure becomes 10 fold calculate its temperature after the compression, work done by the gas

a carnot cycle operate as a heat engine between two bodies of equal heat capacities until their temperature becomes equal if initial temperature of bodies s T1 ,T2 then t their common temperature

Radioactive decay in a material follows which statical distrubution
1) poission
1)normal
3) Maxwell
4) binomial

Steam, at 200° C is passed into a container of negligible heat capacity containing 40 g of ice and 200 g of water at 0° C until the ice is completely melted. Determine the total mass of water in the container

A pressure cooker contains 0.5m^3 water and water vapour mixture at 300 Celsius. Calculate the mass of each if their volumes are equal.

A piece of copper of mass 300g at a temperature of 950degree celcius is quickly transferred to a vessel of negligible thermal capacity containing 250g of water at 25degree celcius. if the final steady temperature of the mixture is 100degree celcius. calculate the mass of water that will boil away

a company markets an electric heater that is described as 100% efficient at converting electric energy to thermal energy. does this violate the second law of thermodynamics?

The steel bed of a suspension bridge is 200 m long at 20°C. If the
extremes of temperature to which it might be exposed are -30°C
to +40°C, how much will it contract and expand?