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When the pressure of a fixed mass of gas is increased to 5 atmospheric pressure the temperature increases from —70°c to 130°c.what is the ratio of the initial pressure
A flask weighs 50.26g when completely empty and weighs 50.94g when full of air at 35°c and 80cmHg. What is the density of air at STP if the capacity of the flask is 500cmcube
The amount of heat needed to increase the temperature of 1 gram of substance 1 degree Celsius is called -------
A slab having a thickness of 4 cm and measuring 25 cm on a side has a 40^0 C temperature difference between its faces. How much heat flows through its per hour? K=0.0025 cal/cm.s.^0 C
Dry steam at 100 0c is bubbled into 500g of water originally at 200c. What will be the temperature of the water after 30g of steam has condensed?
The ice and steam point of a mecury in gas thermometer of centigrate scale &of uniform bore corresponds respectively to 3cm &19cm length of the mecury thread when the length is 12cm what will the temperature be?
A mixture of saturated water and saturated steam at a temperature of 300ᵒC is contained in a closed vessel of 0.1 m3 capacity. If the mass of saturated water is 1kg find the mass of steam in the vessel. Also find the pressure, specific volume, dryness fraction and enthalpy of the mixture
An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 489 Hz when the train is approaching him and 473 Hz when the train is receding from him. Using these frequencies, he calculates the speed of the train. What value does he find? (Assume the speed of sound in air is 343 m/s.)

3. A rigid vessel of volume 0.86 m3 contains 1 kg of steam at a pressure of 2 bar. Evaluate the specific volume, temperature, dryness fraction, internal energy, enthalpy, and entropy of steam. The steam is heated to raise its temperature to 150°C. Show the process on a sketch of the p–v diagram, and evaluate the pressure, increase in enthalpy, increase in internal energy, increase in entropy of steam, and the heat transfer. Evaluate also the pressure at which the steam becomes dry saturated.

4. Ten kg of water at 45°C is heated at a constant pressure of 10 bar until it becomes superheated vapour at 300°C. Find the change in volume, enthalpy, internal energy and entropy.
a mixture of saturated water and saturated steam at a temperature of 300ᵒC is contained in a closed vessel of 0.1 m3 capacity. If the mass of saturated water is 1kg find the mass of steam in the vessel. Also find the pressure, specific volume, dryness fraction and enthalpy of the mixture.