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A special high-temperature vapor-compression cycle heat pump for a spacecraft is to be designed that uses water as the working fluid. The evaporator is at 100.°C and the condenser is at 300.°C. The refrigerant enters the condenser as a saturated vapor at 1.80 kg/min and exits as a saturated liquid. Assume that the isentropic efficiency of the compressor is 91.0%. Determine
a. The coefficient of performance of this system.
b. The amount of heat (in kW) transferred from the cold to the warm region.
If 4.5 of ammonium chloride were dissolved in 200 L of water what would be the ammonium chloride concentration in mg/L
Calculate the collision frequency Z1 of a single O2 molecule under these conditions. Assume the diameter of an O2 molecule is d= 2.92x10^-10 m. Assume oxygen behaves ideally under these conditions.
Write the VSEPR Aformula for the N atom as the central atom in glycine. What is the approximate C-N-H bond angle. Explain on the basis of VSEPR theory. What is the approximate O-C-O bond angle. Explain on the basis of VSEPR theory.
The reaction will be spontaneous at high temperatures because increasing the temperature of a system with a negative change in S eventually results in a positive change in G.
Calculate the molar mass of the unknown gas. (Remember that the faster the rate of effusion, the shorter the time required for effusion of 1.0 L; that is, rate and time are inversely proportional.)
The hydrogen phosphate ion is the conjugate acid of the phosphate ion. State the balanced chemical equation and the Ka expression for the dissociation of aqueous hydrogen phosphate.
find the vapor pressure of a water solution in which the mole fraction HgCI2 (a nonvolatile solute) is 0.163 at 25.
What is the equilibrium concentration of SCN if the Kc=400 for the following reaction at equilibrium if the [Fe3+]=2.00E-3 M and FeSCN 2+ = 4.00E-1M
analyze the state shape the hybridization of the central atom and give the ideal bond angles and any expected
Write the cell notation for a voltaic cell with the following half-reactions Al(s) ? Al3+(aq) + 3e- 2H+(aq) + 2e- ? H2(g)
viniger is made by adding 33 g of acetic acid to 625 g of water what is the percent by mass of acetic acid in the solution of viniger?
During the dehydration reaction when acetaldehyde was reacted with KOH in ether, an intermediate was formed. What was this intermediate that was eventually converted to the final product
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