Calculate the specific heat of the material in J/g-deg C if material of 10 kilograms raises by 2 deg C when 2000 joules of heat is added. O 100 O 50 O 0.1 O 0.2 O none of the above
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- (9A metal rod made of some alloy is to be used as a thermometer. At OoC its length is 40000cm, and at 1000C its length is 40060cm. (a) What is the linear expansion coefficient of the alloy? (b) what is the temperature when its length is 39975cm?Prove that k = 1.35 in the problem: The internal energy of a certain ideal gas is given by the expression u = 850 + 0.529 Pv Btu/lb. where P is in psia. Identify the exponent k in the Pvk = C for this gas undergoing in an isentropic process.A gas is compressed under isothermal condition. The change of pressure is from 800 atm. to 803 atm. Calculate change in the density of gas A 0.6% B 1% C 2.5 D 0.375% U
- An aluminum pipe has a length of 60 m at a temperature of 10° C. An adjacent steel pipe at the same temperature is 5 mm longer than the aluminum pipe. At what temperature (degrees Celsius) will the aluminum pipe be 15 mm longer than the steel pipe? (Assume that the coefficients of thermal expansion of aluminum and steel are aAL=23x 10^-6°C and as=12x10^-6° C respectively)Calculate the temperature of 0.39 mole of Xenon gas that occupies 9850 millimeters under a pressure of 631 torr.-A rod 3 m long is heated from (10 to 90) °C, if the modulus of elasticity equal to 10000O MN/m2, and coefficient of thermal expansion = 0.000012 per °C, the new long of rod after expansion is 0.168 cm 0.288 cm 0.208 cm 0.348 cm 0.388 cm Other:
- :A rigid tank contains 5 kg of saturated vapor steam at 100°C. The steam is cooled to the ambient temperature of 25°C. a) Determine the entropy change of the steam, in KJ/K b) For the steam and its surrounding, determine the total entropy change associated with this process, in KJ/K.A wire 100 meter long at 20 °C has a linear temperature coefficient of 2 * 10-51. The wire is heated and expands to a length of 100.01 m. What is the final temperature?1. If the work done 10000 cal, and the initial pressure 100 atm, when the ideal gas | expand isothermally and reversibly from the initial l volume (V1) to the final volume (10 V1), R = 1.987 cal/mole.K. ~ (A) calculate V1. (B) If there are - 2 moles from ideal gas what is the temperature.
- To ensure a tight fit, the aluminum rivet used in airplane construction are made slightly larger than the rivet holes and cooled by dry ice (solid CO2) before being driven. If the diameter of a hole is 0.500 cm, what should be the diameter of a rive at 20 degree Celsius if its diameter is equal that of a hole when the rivet is cooled to -78 degree Celsius, the temperature of dry ice? Assume the coefficient of expansion to remain constant.A 9.00-mol sample of H₂ gas is contained in the left side of the container shown below, which has equal volumes on the left and right. The right side is evacuated. When the valve is opened, the gas streams into the right side. H₂ Valve Vacuum (a) What is the entropy change of the gas? J/K (b) Does the temperature of the gas change? Assume the container is so large that the hydrogen behaves as an ideal gas. The temperature decreases. O The temperature increases. The temperature does not change. ✓What temperature is required to obtain 0.4%C at a distance of 0.3 mm beneath the surface of a 0.22% C steel in 2h, when 1.1% C is present at the surface? Assume that the iron is FCC. (Please see figure 5.12 below for diffusion coefficient data. Please use your notes for a table of erf() function values Diffusion coefficient D (cm²/s) ܐ ܐ ܐ ܐ 10- 10-5 10- 10-10 10-11 10-12 10-13 10-14 10-15 Temperature (°C) 2000 1500 1200 1000 900 800 700 600 Cin graphite Mg in MgO Ca in Cao H in FCC iron C in FCC iron Fe in FCC iron Fe in BCC iron H in BCC iron C in BCC iron Fe in FeO 500 5 6 7 8 9 10 11 12 13 104 T(K) Figure 5-12 The diffusion coefficient D as a function of reciprocal temperature for some metals and ceramics. In this Arrhenius plot, D represents the rate of the diffusion process. A steep slope denotes a high activation energy.