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Question on free expansion:
3 moles of an ideal gas undergo an expansion from a volume of 20 liters to a volume of 30 litres (1L = 0.001 m^3 ). The temperature of the initial and final states are both 20?C
(a) Calculate the entropy change of the gas if this process is a reversible isothermal expansion
(b) Calculate the entropy change of the universe if this process is a reversible isothermal expansion
(c) Calculate the entropy change of the gas if this process is an irreversible free expansion
(d) Calculate the entropy change of the universe if this process is an irreversible free expansion.
a block is made of an unknown material. when placed in water the block floats and 4 m3 of the block is observed to be
Nicole throws a ball straight up. Chad watches the ball from a window 5.80m above the point where Nicole released it. How fast did Nicole throw the ball
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At a steel mill a 50 Kg chunk of iron at 22 Celsius is heated to it's melting point , completely melted , How much energy is required to heat the iron to it's melting point
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copper has 8.5 x 10^28 electrons per cubic meter. if a current of 1.55 A is flowing in the wire, what is the average drift speed of the electrons along the wire
q1. a camera falls from a blimp that is 259 m above the ground and rising at a speed of 10.2 ms.find the maximum height
Consider Earth's curvature, but ignore its rotation. The mass and average radius of Earth are 5.974 × 10^24 kg and 6371 km
A parallel plate capacitor with plates of area 320 cm.^2 is charged to a potential difference V and is then disconnected from the voltage source, What is the charge on the positive plate of the capacitor
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