The utilization of natural gas reserves with high carbon dioxide (co2) content poses an enrichment problem that requires separation. in addition, the proposed use of co2 for enhanced oil recovery creates further need to characterize the vapor-liquid equilibrium properties of ch4-co2 mixtures. cryogenic distillation has been proposed at low temperatures (< -50 oc) and pressures below 4 mpa, where the formation of solid co2 is possible. investigate the vapor-liquid equilibrium behavior for the ch4-co2 mixture for mixtures containing 10, 30, 50, 80 mol% ch4. one source for experimental data for the ch4-co2 system is mraw, hwang, and kobayashi, journal of chemical engineering data, vol. 23 (2), p. 135 (1978). compare the phase equilibrium boundaries by using the peng robinson and soave-redlick-kwang equations of states and also adjusting the binary interactions parameter (kij) so that the model predictions match as closely as possible to existing experimental data.

The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Many reactions take place in aqueous solution. when potential reactants are mixed, a reaction will occur if there is some driving force that favors the formation of products. it is often convenient to categorize reactions in terms of these driving forces: precipitate formation, in which an insoluble solid is formed, weak electrolyte formation, as in a neutralization reaction involving water, or transfer of electrons, as in a redox reaction. these reactions can be represented by full molecular equations, which contain all species in the reaction mixture, or by net ionic equations, which show only the species that actually undergo a change. the latter does not contain the spectator ions, which do not undergo a net change or do not take part in the reaction. part a when the following two solutions are mixed: k2co3(aq)+fe(no3)3(aq) the mixture contains the ions listed below. sort these species into spectator ions and ions that react. drag the appropriate items to their respective bins. view available hint(s) spectator ions ions that react part b what is the correct net ionic equation, including all coefficients, charges, and phases, for the following set of reactants? assume that the contribution of protons from h2so4 is near 100 %.ba(oh)2(aq)+h2so4(aq)→ express your answer as a chemical equation. view available hint(s) nothing provide feedback