A 3-meter-high room is heated through a vertical steam pipe. If the bulk temperature of steam in the room was 25°C when the steam in the pipe is 98°C. determine the minimum dimension of the pipe that could generate a power of 725W if the pipe is (a) square and (b) circular

A 3-meter-high room is heated through a vertical steam pipe. If the bulk temperature of steam in the room was 25°C when the steam in the pipe is 98°C. determine the minimum dimension of the pipe that could generate a power of 725W if the pipe is (a) square and (b) circular

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter2: The Kinetic Theory Of Gases

Section: Chapter Questions

Problem 15CQ: One cylinder contains helium gas and another contains krypton gas at the same temperature. Mark each...

See similar textbooks

Similar questions

An ideal gas initially at 300 K undergoes an isobaric expansion at 2.50 kPa. If the volume increases from 1.00 m3 to 3.00 m3 and 12.5 kJ is transferred to the gas by heat, what are (a) the change in its internal energy and (b) its final temperature?
An ideal gas is enclosed in a cylinder with a movable piston on top of it. The piston has a mass of 8 000 g and an area of 5.00 cm2 and is free to slide up and down, keeping the pressure of the gas constant. How much work is done on the gas as the temperature of 0.200 mol of the gas is raised from 20.0C to 300C?
One cylinder contains helium gas and another contains krypton gas at the same temperature. Mark each of these statements true, false, or impossible to determine from the given information. (a) The rms speeds of atoms in the two gases are the same. (b) The average kinetic energies of atoms in the two gases are the same. (c) The internal energies of 1 mole of gas in each cylinder are the same. (d) The pressures in the two cylinders ale the same.
An aluminum rod 0.500 m in length and with a cross sectional area of 2.50 cm2 is inserted into a thermally insulated vessel containing liquid helium at 4.20 K. The rod is initially at 3(H) K. (a) If one-halt of the rod is inserted into the helium, how many liters of helium boil off by the time the inserted half cools to 4.20 K? Assume the upper half does not yet cool, (b) If the circular surface of the upper end of the rod is maintained at 300 K. what is the approximate boil-off rate of liquid helium in liters per second after the lower half has reached 4.20 K? (Aluminum has thermal conductivity of 3 100 YV/m K at 4.20 K; ignore its temperature variation. The density of liquid helium is 125 kg/m3.)
For a temperature increase of 10 at constant volume, what is the heat absorbed by (a) 3.0 mol of a dilute monatomic gas; (b) 0.50 mol of a dilute diatomic gas; and (c) 15 mol of a dilute polyatomic gas?
One of a dilute diatomic gas occupying a volume of 10.00 L expands against a constant pressure of 2.000 atm when it is slowly heated. If the temperature of the gas rises by 10.00 K and 400.0 J of heat are added in the process, what is its final volume?
The internal energy of a system increases by 1350 J when the system absorbs 1150 J of heat energy at a constant pressure of 1.01 X 105 Pa. By how much does the volume (m3) of the system change?
One gram of water (1 cm3) becomes 875 cm3 of steam when boiled at a constant pressure of 1 atm (1.013 x 105 Pa). The heat of vaporization at this pressure is Lv = 2.256 x 106 J/kg. Compute a) the heat absorbed by the water b) the work done by the water when it vaporizes and c) its increase in internal energy.
The 10 m long pipe has an inner radius of 70 mm, an outer radius of 80 mm, and is made of stainless steel (k = 15 W / [m ° C]). The temperature of the inner surface is maintained at 150 ° C, and the outer surface is 30 ° C. At constant conditions and there is no heat generation from the pipe, calculate the heat transfer rate that occurs in the pipe wall. = Answer watt.
A certain mechanical device with a mechanism similar to a piston contains a certain amount of gas. Upon compression from 30 L to 10 L, the gas released 450 J of heat. Experiment shows that the external pressure of the mechanical device is given by:Pext = AsinV + BcosV + CsinhV + DcoshVWhere:A = 100B = 80C = 1x10⁻²⁵D = 5x10⁻³⁰sin = sine functioncos = cosine functionsinh = hyperbolic sine functioncosh = hyperbolic cosine functionV = in litersPext = in atmDetermine the change in internal energy of the system in kilojoules.TIP: usually, expressions involving trigonometric functions are in radians.
How much work is done when 10 ft3 of an air is initially at a pressure of 1 atm and a temperature of 0oC experience an increase of pressure to 6 atm in a closed and rigid cylinder?
A 1.0 m * 1.5 m double-pane window consists of two 4-mm-thick layers of glass (k = 0.78 W/m·K) that are separated by a 5-mm air gap (kair = 0.025 W/m·K). The heat flow through the air gap is assumed to be by conduction. The inside and outside air temperatures are 20°C and 220°C, respectively, and the inside and outside heat transfer coefficients are 40 and 20 W/m2·K. Determine (a) the daily rate of heat loss through the window in steady operation and (b) the temperature difference across the largest thermal resistance.