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Water, H2O- heat capacity of a solid 0.49 cal/g °C, heat of fusion 80.0 cal/gHeat capacity of liquid 1.00 cal/g° C, heat of vaporization 540 cal/gHeat capacity of gas 0.48 cal/g° C
1. How much heat is needed to warm 45.6 grams water from 23.0° C to 40.0 °C?2. What quantity of heat is involved in changing 23.6 grams of ice at -34.0 °C to ice at 0 °C?3. How much heat is removed to convert 532 grams of water at 0 °C to ice at 0 °C?4. How much heat is released when 57.8 grams steam at 109°C cools to water at 100°C?5. How much heat is required to convert 905 grams of water at 21.0°C to steam at 121 °C?6. How much heat is released when 361 grams of steam at 100°C cools to water at 45.6°C?Aluminum constants- heat of fusion 10.659 J/mole, heat capacity of solid 24.3 J/mol°C, melting point 660.2°C.7. How much heat is needed to warm 5.67 moles aluminum from 22.0 °C to 90 °C?8. How much heat is needed to warm 7.00 moles aluminum from 27.0°C to liquid aluminum to its melting point?9. You are going to use water to cool molten aluminum to the solid state. You have 15.9 grams of molten aluminum at its melting point. If it is cooled to the temperature of 16.0°C, what will the final temperature of the cooling water be if you use 256 grams of water initially at 22.0 °C to cool the aluminum?
How much energy (heat) is released when 1.9 moles of H2 reacts with 0.7 moles of Cl2 to create HCl(g) if the ΔHrxn = -184.6 kJ.
Imidazole is a weak acid, and thus reacts with strong bases to form the corresponding anion. Show this reaction, and draw resonance structures that account for the stability of conjugate base.
A physiological saline solution contains 164 mEq/L each of Na+ and Cl-.How many moles each of Na+ and Cl- are in 0.500 L of the saline solution.
The reaction CH3CH2NO2 + OH- → H2O + CH3CHNO2- obeys the rate law d[A]/dt = -k[A][OH-], where A denotes CH3CH2NO2. It takes 0.5 min for one percent of the A to react at 25°C.
2500 kg/hr of a mixture containing equal parts by mass of benzene and toluene are distilled. The flow rate of the overhead product stream is 988 kg/hr , and the bottom stream contains 17.03 wt% benzene.
Mercuric sulfide HgS is one of the least soluble salts known, with Ksp=1.6x10^-54 at 25 C. Calculate both the molar solubility and the solubility of HgS
What is the molar concentration of the excess reactant once this reaction has finished? (40%)
Detailed analysis of the 369 and 295 cm-1 bands show them to arise from totally symmetric modes. Show that the Raman spectrum is consistent with a trigonal-bipyrimidal geometry.
An 18-karat gold necklace is 75% gold by mass, 16% silver, and 9.0% copper. How many grams of copper are in the necklace? If 18-karat gold has a density of 15.5
A solution of salt (molar mass 90 g mol -1) in water has a density of 1.29 g/mL. The concentration of the salt is 35% by mass.
Critical constants of a gas with van der Waals parameters, Estimate the critical constants of a gas with van der Waals parameters
A concentrated sulfuric acid solution is 65.0% H2SO4 by mass and has a density of 1.55 g/mL at 20°C. What is the mass of 8.00 L of the concentrated sulfuric acid solution?
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