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An ideal gas at STP (1 atm and 0°C) is taken through a process where the volume is expanded from 25 L to 50 L. During this process the pressure varies inversely
A 0.12 kg balloon is filled with helium (density = 0.179 kg/m^3). If the balloon is a sphere with a radius of 5.2 m, what is the maximum weight it can lift?
A house has well-insulated walls. It contains a volume of 100 m^3 of air at 300 K. Calculate the energy required to increase the temperature
At the start of a trip, a driver adjusts the absolute pressure in her tires to be 2.82*10^5 Pa when the outdoor temperature is 286 K
It is proposed that a device be constructed to operate as follows: an evacuated tank of volume 1m3 is attached to the exhaust of an air-turbine-driven grinding
The rate of revolution of a multicylinder gasoline engine in an airplane, operating at 2500 rev/min, takes in energy 7.89*10^3 J and exhausts 4.58*10^3 J
A 20% efficient real engine is used to speed up a train from rest to 5.00 m/s. It is known that an ideal (Carnot) engine using the same cold and hot reservoir
The heat engine operates reversibly and draws 1200 KJ of heat from the 200 K reservoir. The work produced is 200 KJ.
In a steam plant the steam leaves the boiler at 2000kpa+250C deg. It is then expanded in an engine + finally exhausted into a condenser
The figure shows a thermodynamic process followed by 150mg of helium.
Learning Goal: To practice Problem-Solving Strategy for problems involving calculating work done on an ideal gas.
A single stage, singl.: acting air compressor running at 1000 rev/min delivers air at 25 bar. For this purpose the induction and free air conditions
Erlenmeyer flask contains 0.25g Zn then add 10 mL 6M of HCl then when it cools back down to 21 degrees Celsius connect it to a Gas piston
When pressure is applied to a liquid, its volume decreases. Assuming that the isothermal compressibility is independent of pressure, derive an expression
Air initially at 100 psia, 500 F undergoes an internally reversible process to 45 psia. For each of the following cases, determine for 10 lbm of air
In a single acting two-stage reciprocating air compressor. 6 kg of air per minute is compressed from 1.013 bar and 17 °C to 10 bar.
One-gram molecule of a gas expands isothermally to four times its volume. Calculate the change in entropy in terms of the gas constant.
Two reversible heat engines X and Y are arranged in series. The engine X rejected heat directly to Y. Engine X receives 400 KJ of heat at 427 degrees centigrade
Calculate the density of NO2 gas at 0.970 atm and 35 degrees Celsius.
What are the first and second laws of thermodynamics? How do these laws affect ecosystems?
You are supplied with a 1.87% concentration (by weight) hydrogen peroxide solution. Assume the density of your solution is 1.00 g/mL.
Steam enters a turbine with a velocity of 20 ms-1, a pressure of 3 bar, internal energy of 3500 kJ kg-1 and density of 1.7 kg ms-3.
Air enters a steady-flow compressor with a specific enthalpy of 293.4 kJ/kg and a velocity of 60m/s, and leaves with a specific enthalpy of 343 kJ/kg
A home builder installs electric baseboard heat and claims, "It is the cheapest and cleanest way to go."
From Introduction to Chemical Engineering Thermodynamics, Smith, Van Ness, & Abbott, Sixth Edition