Molecular Physics | Thermodynamics Answers

in a vacum flask,which methods of heat transfer are prevented by the vacum?

oxygen gas kept at 45.00 degrees celcius has a pressure of 105.0 kPa. the pressure is decreased to 90.00 kPa. what temperature will allow this to happen?

A propane cylinder having the volume of 20 liters, has been used outside in a temperature of 8 degrees c
And found to be virtually empty . The valve is closed and is left out in the sun where it's temperature increases to 40 degrees c determine;
A) the pressure of the cylinder at this temperature
B) the mass of propane still in the cylindery

A cooking pan whose inner diameter is 20 cm is filled with water and covered with a 0.5 kg lid. If the local atmospheric pressure is 101 kPa, determine the temperature at which the water will start boiling when it is heated.

if the same amount of heat energy is added to a beaker containing 100ml of ethanol and a beaker containing 100ml of water, which liquid experiences the greater rise in temperature.

If a force of 80N extends a spring of natural length 8m by 0.4m what will be the length of the spring when the applied force is 100N

solve on the interval [0, 2pi). 2.cos(x)=-0.8092

a 2.44 kg sledgehammer hits the spike with a speed of 63.6 m/s. how much does the total internal energy increase?

1 An ideal gas is in equilibrium at initial state with temperature T=137oC, pressure P = 0.75Pa and volume V = 0.75 m3. If there is a change in state in which the gas undergoes an isothermal process to a final state of equilibrium during which the volume is doubled. Calculate the temperature and pressure of the gas at this final state.

Find the final temperature of a mixture of 200 grams of water at 85 degrees celsius placed inside an aluminum container of mass 20 grams into which is added 20 grams of ice at minus 10 degrees celsius. Please show formulas