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- Find DSsys and DSsurr if 3.000 mole of argon is expanded reversibly and isothermally from a volume of 500.0 L to a volume of 2500. L at 298.15 K.At 1 atm, how much energy is required to heat 87.0 g H2O(s)87.0 g H2O(s) at −10.0 ∘C−10.0 ∘C to H2O(g)H2O(g) at 121.0 ∘C?121.0 ∘C? Use the heat transfer constantsAn elastomer is a polymer that can stretch and contract. In a perfect elastomer the force opposing extension is proportional to the displacement x from the resting state of the elastomer, so |F| = kfx, where kf is a constant. But suppose that the restoring force weakens as the elastomer is stretched, and kf(x) = a − bx1/2. Evaluate the work done on extending the polymer from x = 0 to a final displacement x = l.
- At 1 atm, how much energy is required to heat 95.0 g H2O(s)] at −14.0 ∘C to H2O(g) at 115.0 ∘C? Use the heat transfer constants.At 1 atm, how much energy is required to heat 85.0 g H2O(s) at −12.0 ∘C to H2O(g) at 121.0 ∘C? Use the heat transfer constants found in thisMake a PV Diagram for these two heat reservoirs Step 1: Isothermal Expansion=Q = 0, W > 0 Step 2: Adiabatic expansion =Q = 0, W > 0 Step 3: Isothermal Compression =Q = 0, W < 0 Step 4: Adiabatic Compression=Q = 0, W < 0
- 2-Propanol (isopropanol) is commonly used as ‘rubbing alcohol’ to relieve sprain injuries in sport: its action is due to the cooling effect that accompanies its rapid evaporation when applied to the skin. In an experiment to determine the enthalpy of vaporization of 2-propanol, a sample was brought to the boil. It was then found that when an electric current of 0.812 A from a 11.5 V supply was passed for 303 s, then 4.5 g of the alcohol was vaporized. What is the (molar) enthalpy of vaporization of isopropanol at its boiling point? _____ kJ/mol. 3 sig. number normal format.A 1.00 mol sample of water vapour is enclosed in a rigid container equipped with a 9.97 Ω electric resistance heater. When a current of 0.200 A is passed through the resistor for 100.0 s, the temperature of the apparatus was observed to increase by 0.465 K. Separate measurements on the evacuated container show that the heat capacity of the container and resistance heater is 60.50 J. K-1. Calculate the value of Cv for the gaseous water (water vapour)A sample consisting of 1.00 mol Ar is expanded isothermally at 20 °C from 10.0 dm3' to 30.0 dm3'. What is w if the expansion was carried out freely (against zero external pressure)? A. 2.68 kJ B. -1.62 kJ C. O
- At 1 atm, how much energy is required to heat 87.0 g H2O(s)87.0 g H2O(s) at −24.0 ∘C−24.0 ∘C to H2O(g)H2O(g) at 117.0 ∘C?117.0 ∘C? Use the heat transfer constants found in this table.A 5.00 dm3 gas cylinder containing 4.00 kg of NH3(g) at 27oC developed a leak leading to the escape of the gas into the atmosphere. If the atmospheric pressure is 101.3 kPa, calculate the PV work done by the gaas, assuming ideal behavior.A sample consisting of 1.00 mol Ar is expanded isothermally at 20 °C from 10.0 dm3' to 30.0 dm3'. What is w if the expansion was carried out against a constant external pressure equal to the final pressure of the gas? A. 1.62 kJ B. -1.62 kJ C. 0