Molecular Physics | Thermodynamics Answers

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At a party some balloons are filled with helium. To fill them they have used gas from a bottle with volume 45 dm^3 and the pressure 1.00 MPa. The balloons are made to hold a pressure of 150 kPa. How many such balloons you can inflate if the balloons have an average volume of 4.0 dm^3?

The temmerature of 2.00 mol of an ideal monatomic gas is raised 15.0 k in an adiabatic process. what are (a) the work W done by the gas ,(B) the energy transferred as heat Q, (c) the change in
E int in internal energy of the gas, and (D) the change in K in the average kinetic energy per atom?

a) Two 50 g ice cubes are dropped into 200 g of water in a thermally insulated container. if the water is initially at 25 C, and the ice comes directly from a freezer at -15 c ,what is the final temperature at thermal equilibrium?
b)what is the final temperature if only one ice cube is used?

A closed Vessel contains air at a temperature 30 C and a pressure of one atm. it is heated to 150 C. What will be the new pressure??

When water density increased,"water thrust" increase or decreased?

Reply quickly.

what is the maximum work obtainable from an object with heat capacity Cp , initially at temperature T2 by a heat engine working between this object and a heat reservoir at temperature T1?

Use the 5-step method and be sure to include units where appropriate. Round your answers to the correct number of significant digits.
Adjust the density formula and solve the problems below:

How many cm3 would a 515.932 g sample of copper occupy if it has a density of 18.92 g/cm3?

Use the 5-step method and be sure to include units where appropriate. Round your answers to the correct number of significant digits.
Adjust the density formula and solve the problems below:

What is the mass of a 1350 cm3 sample of pure silicon with a density of 21.336 g/cm3?

A brass rod is two metre long at a certain temperature. What is the length for temperature rise of 100 kelvin if the expansivity of brass is 0.0000018/kelvin.

Use the density formula to solve the following problem:

If 130.943 g of a liquid occupy a space of 135.0 ml, what is the density of the liquid in g/cm3?