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How much heat is needed to convert 923 g of ice at -30°C to steam at 119°C? (The specific heats of ice, steam, and liquid are 2.03 J/g · °C, 1.99 J/g · °C, and 4.18 J/g·°C, respectively. The heat of fusion is 6.02 kJ/mol and heat of vaporization is 40.79 kJ/mol.)
Arrange the following ionic compounds in order of decreasing amount of energy released in lattice formation:
Tungsten is usually produced by the reduction of WO3 with hydrojen as shown by the equation; WO3(s) + 3 H2(g) ? W (s) + 3 H2O (g) The enthalpy for the reaction,(delta H rxn ) ?H°rxn is + 114.5 kj. The entropy for the reaction (Delta S rxn) ?S°rxn i..
A series of lines in the spectrum of atomic hydrogen has a maximum wavelength of 7459.9 nm and then progresses to lower wavelengths. What is the wavelength of the 2nd line in the series in nm
What is the change in average specific (kJ/kg) enthalpy of this system if the quality increases by 0.71 at a constant pressure of 10 bar?
Write out the balanced net ionic equations representing the reactions that occur when iron (III) in water reacts with: A) Hydrochloric Acid.
For the reaction 2HCl+Na2CO3 →2NaCl+H2O+CO2 what volume of 0.45 M HCl solution would be needed to produce 2.5 L of CO2 at STP?
the resulting mixture has (pb2+)i=1.0x10^-3M, (so4^-2)i=1.0x10^-4 for pbso4 ksp=1.3x10^-8. compare qsp to ksp and decide whether a precipitate will form.
Explain why a buffer made of equal concentrations of CH3COOH and CH3COO- does not change in pH when a small amount of NaOH (a strong base) is added to the solution. Does the NaOH dissociate into ions when it is added to the solution?
determine the amount of heat (in kJ) given off when 1.42 * 10^4 g of NO2 is produced according to the following equation : 2 No(g) + o2(g) --> 2NO2(g) H = -114.6kj
Which reagent is the limiting reactant when 1.250 g Al(OH)3 and .750 g H2SO4 are allowed to react? How many moles and grams of Al2(SO4)3
When a sample of H2S(g) (9.811 mol) is placed in 180.0 L reaction vessel at 724.0 K and allowed to come to equilibrium the mixture contains 0.01627 mol/L of S2(g). What is the equilibrium concentration (mol/L) of H2S(g)? 2H2S(g) = S2(g)+2H2(g)
AgCl is a sparingly soluble salt, with a solubility of about 10-5 M in pure water. Adding KCN increases the solubility of AgCl because: CN- reacts with Ag+ to make a soluble complex.
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