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The complete combustion of hydrogen, H2(g), to form H2O(l) at constant pressure, releases 285.8 kJ of heat per mole of H2(g). -------- H2(g) + 1/2O2(g) ? H2O(l) • What is the enthalpy of the reaction? • Is this reaction exothermic or endothermic? • Draw an enthalpy diagram for the reaction. Make sure to properly label axis, location of reactants and products, sign of ?H, and flow of heat Please explain this question in detail to me because i am really lost Please do not answer if you are just going to answer the question if you are going to post a retarded answer on how i should learn thing ...because i am trying to learn how to do this and i have been trying to work it out all night. And my teacher made this an open class question not a homework question but i need to learn this for a test.
Calculate the mass, in grams for a gold sample that absorbs 225 J to change its temperature from 15 Celsius to 47 degrees celsius.
Green light has a wavelength of approximately 645 nm. What is the energy in kJ of 1.00 mole of photon of green light
A sample of an ideal gas has a volume of 3.35 L at 14.40C and 1.50 atm. What is the volume of the gas at 21.60C and 0.987 atm
The original volume is 70. cm3. If the combustion of this mixture releases 855 J of energy, to what volume will the gases expand against a constant pressure of 640. torr if all the energy of combustion is converted into work to push back the pisto..
the advantages and disadvantages of using methanol, ethanol and water as a solvent for reactions with sodium borohydride?
a 100.0 ml sample of 0.10 m nh3 is titrated with 0.10 m hno3. determine the ph of the solution after the addition of
consider the following unbalanced reaction.p4s f2g -gt pf3ghow many grams of f2 are needed to produce 120. g of pf3 if
Drinking water in the USA cannot exceed 0.5 ppm mercury. What mass of mercury is present in 1.3 L of water at this concentration. What is the molar concentration of mercury
The initial temperature of the calorimeter is 23.0}C. If 7.20g of CaCl2 is added to the calorimeter, what will be the final temperature of the solution in the calorimeter? The heat of solution\Delta H_soln of CaCl2 is -82.8 kJ/mol.
A balloon is filled to a volume of 7.0 102 mL at a temperature of 12.0°C. The balloon is then cooled at constant pressure to a temperature of 1.00 multiplied by 102 K. What is the final volume of the balloon?
Although his product was a white solid, it melted over a broad temperature range that was much lower than the melting point of vanillyl alcohol. His instructor suggested washing the product with dilute sodium bicarbonate; when he did so, about hal..
in the formula for sodium phosphate na3po4 how many moles of sodium are represented? how many moles of phosphorus? how
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