Entropy change for freezing
What is the entropy change for freezing 4.25 g of C2H5OH at 158.7 K? H = -4600 J/mol.
Answer in units of J/K.
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If you started a ride with ice packs that held 1800 of frozen water at 0 , and the temperature of the water at the end of the ride was 32 , how many calories of heat energy were absorbed?
What mass of CaCl2 , when dissolved in 100.00 g of water, gives an expected freezing point of 5.0°C; CaCl2 is ionic? What mass of glucose would give the same result?
An expansion project being considered by your firm has an initial cost of $1,250,000 and expected net cash flows of $270,000 per year for the first 3 years, and $380,000 per year for the next three years. Assume that the project will be terminated
A gas is placed in a storage tank at a pressure of 20.0 atm at 20.3 C. As a safety device, there is a small metal plug in the tank made of a metal alloy that metls at 125 C. if the tank is heated.
Ammonia gas at 223°C and 90. atm flows into a reactor at a rate of 480. L/min. Carbon dioxide at 223°C and 43 atm flows into the reactor at a rate of 600. L/min. What mass of urea is produced per minute by this reaction assuming 100% yield
Calculate the pH at teh second equivalence point in the titration of 0.1000L of a 0.1000 M solution of the weak diprotic species H2A that is titrated with standardized 0.1000 M KOH.
A compound called pyrene has the empirical formula C8H5 . When 4.04 g of pyrene is dissolved in 10.00 g of benzene, the boiling point of the solution is 85.1°C. Calculate the molar mass of pyrene and determine its molecular formula. The molal
What is the expected freezing point of a solution of 110.5 g of H2SO4 in 225 g of water? Assume sulfuric acid completely dissociates in water.
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