Molecular Physics | Thermodynamics Answers

Calculate the temperature of a fluid when both a Fahrenheit and a Celsius thermometer are immersed in it, under the following conditions :a) the numerical reading is identical in both thermometers? b) the Fahrenheit reading is numerically twice that of the Celsius reading. Express the values in °R and °K.

An aluminum block (c= 9.1×10^2J/kg K) of mass 0.50 kg at temperature of 155°C is dropped into an aluminum calorometer cup of mass 0.200 kg containing 1.00 kg of water (c=4.2×10^3 J/kg K) at 20°C. The system is insulated and attains equilibrium at a final temperature Tf. a) Using the definition of specific heat capacity, set up the Qtotal = equation. b) solve for Tf.

One mole of a monatomic perfect gas initially at temperature T expands from volume V to 2V, (a) at constant temperature, (b) at constant pressure. Calculate the work of expansion and the heat absorbed by the gas in each case? (5marks)

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What is the maximum wavelength of electromagnetic radiation that can eject photoelectrons from a metal with work function of 3.9 eV?

) A 3.65-mol sample of an ideal diatomic gas expands adiabatically from a volume of 0.1210 m3 to 0.750 m3. Initially the pressure was 1.00 atm. Determine: (a) the initial and final temperatures; (b) the change in internal energy; (c) the heat lost by the gas; (d) the work done on the gas. (Assume no molecular vibration.)

To raise the temperature of 5 kg of water from 20 0C to 30 0C, a 2-kg iron bar is heated and then dropped into the water. What should the temperature of the bar be

Heat is supplied to an engine at the rate of 10^(6)J minute ^(-1) and the engine has an output of 10 horsepower.What is the efficiency of the engine and what is the heat output per minute?

An aluminum block (c = 9.1 X 10² J/kg K) of mass 0.50 kg at a temperature of 155 degrees Celsius is dropped into an aluminum calorimeter cup of mass.200 kg containing 1.00 kg of water ( c = 4.2 X 10³ J/kg K) at 20 degrees Celsius. The system is insulated and attains equilibrium at a final temperature T_f

(I) Using the definition of specific heat capacity, set up the Q_total = 0 equation.

(II) solve for T_f

Calculate the temperature of a fluid when both Fahrenheit and a Celsius thermometer are immersed in it, under the following conditions (a) the numerical reading is identical in both thermometers, (b) the Fahrenheit is numerically twice that of the Celsius reading. Express the values in ⁰R and ⁰K.