The specific internal energy of helium at 300 K and 1 atm is 3800 J/mol, and...

The specific internal energy of helium at 300 K and 1 atm is 3800 J/mol, and the specific molar volume at the same temperature and pressure is 24.63 L/mol. Calculate the specific enthalpy of helium at this temperature and pressure in units of J/mol.

At what rate (in units of kW) is enthalpy transported by a stream of helium at 300 K and 1 atm with a molar flowrate of 250 kmol/h?

The specific internal energy of a fluid is 200 cal/g. What is the internal energy of 25 g of this fluid, in units of cal?

If the fluid leaves a system at a flow rate of 3 g/min, at what rate, in units of cal/min, does it transport internal energy out of the system?

Expert Solution

queen_honey_blossom answered 1 year ago

The value of the universal gas constant is 0.082 (L atm)/(mol K) or 8.31 J/(mol k)...

The value of the universal gas constant is 0.082 (L atm)/(mol K) or 8.31 J/(mol k) and 1.00 atm = 760 mmHg or 760 torr. When a sample of H2O2 is decomposed, 350 mL of O2 gas is collected at 20 °C and at a partial pressure of 695 torr. How many moles of O2 gas were collect The value of the universal gas constant is 0.082 (L atm)/(mol K) or 8.31 J/(mol k) and 1.00 atm = 760 mmHg...

Estimate Keq for the following equilibria at 350 K. R = 8.3145 J/(molK). Substance ΔHo(kJ/mol) So(J/(molK))...

Estimate Keq for the following equilibria at 350 K. R = 8.3145 J/(mol*K). Substance ΔHo(kJ/mol) So(J/(mol*K)) SnO2(s) -577.6 49.0 H2(g) 0 130.680 CO(g) -110.5 197.7 Sn(s, white) 0 51.2 H2O(l) -285.83 69.95 Fe(s) 0 27.3 Fe3O4(s) -1118.4 146.4 Correct answer. Correct. SnO2(s) + 2H2(g) ⇄ Sn(s, white) + 2H2O(l) The number of significant digits is set to 2; the tolerance is +/-3% LINK TO TEXT Incorrect answer. Incorrect. 3Fe(s) + 4H2O(l) ⇄ Fe3O4(s) + 4H2(g) Entry field with incorrect answer...

In an experiment, 300 g of aluminum (specific heat of 900 J/kg*K) at 120 Celsius is...

In an experiment, 300 g of aluminum (specific heat of 900 J/kg*K) at 120 Celsius is mixed with 60 g of water at 20 Celsius, with the mixture thermally isolated. You will need to look up the specific heat of water. (a) What is the equilibrium temperature? (b) What is the entropy change for the aluminum block? (c) What is the entropy change for the water? (d) What is the entropy change for the aluminum-water system?

Cgas = 1.3 J/g×K Hvap = 38.56 kJ/mol Cliq = 2.3 J/g×K Hfus = 5.02 kJ/mol ...

Cgas = 1.3 J/g×K Hvap = 38.56 kJ/mol Cliq = 2.3 J/g×K Hfus = 5.02 kJ/mol Csolid = 0.97 J/g×K Condensation Temp = 78.0oC Freezing Pt = -114.0oC Calculate the amount of heat required toconvert 92.6 mL of ethanol, C2H6O, from 110.0oC to -98.0oC.

Consider a 2-mm-diameter sphere immersed in a fluid at 300 K and 1 atm. (a) If...

Consider a 2-mm-diameter sphere immersed in a fluid at 300 K and 1 atm. (a) If the fluid around the sphere is quiescent and extensive, show that the conduction limit of heat transfer from the sphere can be expressed as NuD,cond = 2. Hint: Begin with the expression for the thermal resistance of a hollow sphere, letting r2 →∞ and then expressing the result in terms of the Nusselt number. (b) Considering free convection, at what surface temperature will the...

The entropy of sublimation of a certain compound is 20.7 J K–1 mol–1 at its normal...

The entropy of sublimation of a certain compound is 20.7 J K–1 mol–1 at its normal sublimation point of 101 °C. Calculate the vapour pressure (in torr) of the compound at 9 °C. Assume that the enthalpy of sublimation is constant.

The standard molar entropy of NO is 211 J K-1 mol-1. What is the standard entropy...

The standard molar entropy of NO is 211 J K-1 mol-1. What is the standard entropy of 3 moles of NO at 10 bar?

Given the data: PbO(s), Df Hq = -217.3 kJ mol–1, Sq = +68.7 J mol–1 K–1...

Given the data: PbO(s), Df Hq = -217.3 kJ mol–1, Sq = +68.7 J mol–1 K–1 PbO2(s), Df Hq = -277.0 kJ mol–1, Sq = +68.6 J mol–1 K–1 O2(g), Df Hq= 0.00 kJ mol–1, Sq = +205 J mol–1 K–1 calculate the standard free energy change, DrGq, for the reaction: PbO(s) + ½ O2(g) ® PbO2(s) Select one: a. +1.45 kJ mol–1 b. –29.1 kJ mol–1 c. –68.3 kJ mol–1 d. –90.3 kJ m

For a hypothetical reaction, ΔrHθ = 89.1 kJ/mol and ΔrSθ = 364 J/mol/K. What is the...

For a hypothetical reaction, ΔrHθ = 89.1 kJ/mol and ΔrSθ = 364 J/mol/K. What is the total standard entropy of the reaction, ΔrStotθ, at 343 K?

1) The energy gap of Si at 300 K is 1.11 eV. Assume that n =...

1) The energy gap of Si at 300 K is 1.11 eV. Assume that n = 10^16 /cm^3 . We know that for an undoped/intrinsic Si sample that ni = 1.5x10^10/cm3 . Thus this is a doped n-type Silicon sample. 1a) Obtain the hole density p at 300 K for this sample. 1b) Obtain EF – Ei, in eV 1c) Obtain EC – EF, in eV 1d) Sketch the bands (don’t worry about the horizontal axis, just the position of...

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