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When 5.12g of NaOH were dissolved in 51.55g water in a calorimeter at 24.5C, the temperature of the solution went up to 49.8C a) calculate qh20 b) find delta H for the reaction as it occurred in the calorimeter c) find delta H for the solution of 1g NaOH in water d) find delta H for the solution of 1 mole NaOH in water e) Given the following heats of formation, delta Hf, in kJ per mole, as obtained from a table of delta Hf data, calculate delta H for the reaction NaOH(s)---->Na+(aq)+OH-(aq). Compare your answer with the result you obtained for part d. NaOH(s), -425.6; Na+(aq), -240.1; OH-, -230.0
Small helium-neon lasers emit 4.62 mJ/s of light at 634 nm. How many photons does such a laser emit in one minute?
Describe how a cation exchange resin and a solution of NaOH with a known concentration could be used to determine the amount of NaCl in an aqueous solution
The solubility of CaSO4 in pure water at 0.0 C is 1.13 gram per liter; what is the value of solubility product
empirical and molecular formula what are both the empirical and the molecular formula for the compounds described
Calculate the average molar bond enthalpy of the carbon-chlorine
The complete combustion of methane, CH4, to form carbon dioxide gas and oxygen gas at constant pressure releases 890 kJ of heat per mole of methane consumed. (a) Write a balanced thermochemical equation for this reaction. (b) Draw an enthalpy diagram..
The vapor pressure of chlorine dioxide (ClO2) is 155 Torr at -22.75 ? C and 485 Torr at 0?C. What is the normal boiling point of chlorine dioxide?
Camphor is mixed with methanol, then sodium borohydride is added. Then boil, add mixture to ice and stir.
Write the balanced equation for the ionization of the weak base pyridine, C5H5N, in water, H2O. Phases, such as (aq) or (l), are optional.
Determine the vapor P lowering, freezing point depression, boiling point elevation, and osmotic pressure when the sample is dissolved in 10.0 g water
Bisphenol A is an important component of many polymers, including polycarbonates, polyuethanes, and epoxy resins. It is synthesized from phenol and acetone with HCl as a catalyst. Propose a mechanism.
Solid phosphorus pentabromide, PBr5, has been shown to have the ionic structure [PBr4+][Br? ]. Write the electron-dot formula of the PBr4+ cation
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