Molecular Physics | Thermodynamics Answers

Room temperature constant 20 ° C and relative humidity 20%. How many grams of water must be added to the room air to obtain relative humidity to rise to 60%?

Outdoor air temperature is 0 ° C and relative humidity 90%. The air is blown into the house
and heated to 20 ° C. What is the new relative humidity?

The humidity meter shows the relative humidity of the room air at 78% when the temperature
is 22 ° C. What is the absolute humidity in g / m3 of air and what is Dew point (temperature)?

Room capacity is 250 m3, air temperature 18 ° C and relative humidity 45%.
How many kilograms of water in the room air and how much air can fit in the air
water as water vapor? The total pressure is 101.3 kPa.

Calc the change in entropy of a system containing 1kg of ice at 0degree Celsius which melts reversibly to water at d same temperature.latern heat of fusion of melting is 79.6cal/g

The properties of a closed system change following the relation between pressure and volume as p V = 3.0 where p is in bar V is in m3. Calculate the work done when the pressure increases from 1.5 bar to 7.5 bar.

An iron rod is 2.58m long at 0°C. Calculate the length of a brass rod at 0°C, if the difference between the lengths of the two rods must remain the same at all temperature. Linear expansivity of iron = 1.2 × 10^-5k^-1. Linear expansivity of brass = 1.9 × 10^-5k^-1

A particle mass m, traveling at a speed of v, strikes a stationary particle mass 2m. As a result the partucle of mass m, us deflected through an angle of 45 degrees at a speed of v/2. What is the speed and direction of mass 2m?

A vessel contains a non-linear triatomic gas. If 50% of gas dissociate into individual atom, then find new value of degree of freedom by ignoring the vibrational mode and any further dissociation.
(1) 2.15
(2) 3.75
(3) 4
(4) 1.09

3.5 g of X reacts with a certain mass of Y to form a compound with 2 g of Y left over. 10.5 g of X reacts with a certain amount of Y to form the same compound of mass 42 g.

a. How much of Y combines with X to form the compound?
b. What is the chemical formula of the compound?