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The element Cesium (Cs) freezes at 24.8 C as well as its molar enthalpy of fusion delta H fusion = 2.09 kJ/mol.?
a) While molten Cs solidifies to Cs (s) at its normal melting point, is the entropy change S positive or negative?
b) Compute the entropy change S when 15.0 g of Cs(l) solidifies at 28.4 C.
Enough of a monoprotic acid is dissolved in water to produce a 0.0198 M solution. The pH of the resulting solution is 6.37. Calculate the Ka for the acid.
The standard change in gibbs free energy= -69.0 kJ/mol. What is the change in G for this reaction at 298K when the partial pressures are PNO=0.100 P02=0.350 PN02=0.700 atm
Naturally occurring chlorine is composed of 35Cl and 37Cl. The atomic weight of chlorine is 35.453. What are the percentages of 35Cl and 37Cl in naturally occurring chlorine. Assume that the mass of 35Cl and 37Cl are 35 and 37 amu respectively.
Define the following reaction in a closed reaction flask. If 1.50 atm of gas A is allowed to react with 0.500 atm of gas B as well as the reaction goes to completion at constant temperature and volume, explain what is the total pressure in the rea..
for the reaction X(g) + 3Y(g) equilibrium 3Z(g). Kp=2.08x10^-2 at a temperature of 277 degrees Celsius. Calculate the value of Kc
A chemist measures the amount of bromine liquid produced during an experiment. She finds that 766.g of bromine liquid is produced. Calculate the number of moles of bromine liquid produced.
Burns cause by steam at 100 degrees can be more severe than those caused by water same temperature because steam contains more heat than water
hydrogen peroxide usually comes commercially as a 30 wv aqueous solution with a density of 1.106 gml. calculate the
How much heat is absorbed when 5.53 mol of NH4NO3 solid is dissolved in water? (Heat of soluton = 25.7 kJ/mol)
The absorption spectra of ions have been used to identify the presence of the elements in the atmospheres of the sun and other stars. What is the wavelength of light (in nm) that is absorbed by He+ ions
Calculate the amount of heat (in kj) required to heat 2.75 kg of water from 13.20 degrees celsius to 46.32 degrees celsius
Florine is so reactive that it forms compound with material insert to other treatment when 0.448gm of plantinum is heated in florine, 0.71gm of dark red, volatile solid forms. What is emperical formula
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