Molecular Physics | Thermodynamics Answers

Calculate the change in entropy when 12g of water at -10oC is raised to 100oC and convert to steam at 100oC. Assume that specific heat of water cwater = 4190 J·g-1·K-1, heat of vaporization Lv = 2256 kJ/kg,specific heat of ice cice = 2220 J·g-1·K-1, heat of fusion LF = 334 kJ/kg.

One mole of an ideal gas is first compressed isothermally at 380 K to half of its initial volume. Then 450 J of heat is added to it at constant volume. So, what is the network and total change in internal energy after 2 processes?

Two moles of a monatomic ideal gas (ɣ = 1.67) initially at pressure P1, volume V1, temperature T1 undergoes an isobaric process to volume V2 = 2V1. The gas is expanded adiabatically to V3 = 3V1. Determine final temperature of gas T3 if T1 = 298 K, and sketch the diagram for these processes

One mole of a diatomic ideal gas is cooled from 200oC to 50oC. Determine the change in the translational kinetic energy and the change in the internal energy of the gas

An impulse of 10 kilogram-meter per second acting on an object whose mass is 5 kilogram will cause a change in the objects velocity of: find the solution

An electric heater which produces 900W of power is used to vaporize water. How much water at 100°C can be changed to steam in 3mins by the heater? [Heat of vaporization= 2.26×10^6 J/kg, specific heat capacity of water = 4.2×10^3 J/kg.k].
Thank you

What volume of alcohol with the density of 8.4×10²kg/m³ will have the same mass as 4.2m³ of petrol whose density is 7.2×10²kg/m³

A blacksmith dropped a 1.5 kg iron bead at 300oC into some quantity of water. If the temperature of the water rose from 15oC to 18oC, what is the mass of the water assuming no heat is lost to the surrounding? (Take the specific heat of iron as 0.46 J kg-1 C-1 and that of water as 4.2x103 J kg-1 C-1)
A. 15.44 kg B. 194.58 g C. 15.44 g
D. 194.58 kg

As we have seen, the second law of thermodynamics states that all systems tend toward disorder. Ordered systems tend to become disordered, and it takes work to reorder them.

Now suppose your room were extremely messy and you went in to clean it up. However, you decide to clean up with a broom. You shut the light, close the door and flail away with the broom blindly, in every direction. After a while you stop and turn on the light. Imagine your surprise if the room were perfectly ordered. Now this could happen by chance. It's by no means impossible, yet it never occurs in our experience. Why not?

Take into consideration a similar situation. Put a drop of blue ink in a fish tank full of clear water. The water turns a pale shade of blue as the ink disperses. Each collision between an ink molecule and a water molecule is reversible, so it is possible that the ink would not disperse but stay on a blue blob. This never happens, although it could. Why not?

How much heat is required to convert 1g of ice at 0 degree Celsius to steam at 100 degree Celsius (Heat of fusion of ice = 335 x 10^3 Jkg^-1, heat of vaporization of water = 2.26 x 10^6JKg^-1, specific heat capacity of water = 4200Jkg^-1K^-1)