A copper rod is 300 m long at are temperature of 150 degree C. How much expands

Question

A copper rod is 300 m long at are temperature of 150 degree C. How much expands when heated to 150 degree C. The temperature of a sample of 1.00 L of an ideal gas at an atmospheric pressu5re is 33 degree C. How much moles of gas are present in the sample? Calculate the volume of one mole of hydrogen is STP Five randomly chosen molecules at 500, 600, 700, 800 and m/s. Calculate speed average and the rms rapidity of the molecule. Find the average transition Kinetic energy of the Helium atoms at a temperature of 500 degree K. Assume it behaves like an ideal gas. A sample of 50 grams of copper is at 25 degree. If 1200 J of energy are added as heat, determine the final temperature of the sample A large equilateral tank contains 750 m^3 of gaseous nitrogen at 27 degree C 150,000 Pa (absolute pressure). The tank has a tight piston that album you to change the volume. Determine the pressure if the volume is reduced. 480 m^3 and temperature rises to 157 degree C. An ice tray with negligible mass contains. 350 kg of water at 18 degree C. How much joules and carries should be extracted to cool the water to 0 degree C and freeze it? How much water remains unfreezed after 50.2 kJ are transferred as heat from 260 g of water initially in its freezing point.

Explanation / Answer

1. deltaL = Lo alpha deltaT

= 300 x 16.7 x 10^-6 x 150

= 0.75 m

2. P V = n R T

(101325 Pa) (1 x 10^-3 m^3) = n (8.314) (273 + 33)

n = 0.04 mol

3. P V =n R T

(101325) (V) = (1) (8.314) (273)

V = 22.4 x 10^-3 m^3 Or 22.4 L

4. Average speed = (500 + 600 + 700 + 800 + 0) / 5

= 520 m/s

rms speed = sqrt[ (500^2 + 600^2 + 700^2 + 800^2 + 0^2) / 5 ]

= 589.9 m/s

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