A typical high pressure RNA polymerization experiment consists of -5mg of powder

Question

A typical high pressure RNA polymerization experiment consists of -5mg of powdered mineral catalyst and an aqueous solution contained in a silver capsule without a gas headspace. The reaction medium is a 15 mM NaCl aqueous salt solution. In one recent experiment the maior minerals were calcite (CaCOs) and nontronite (CaOo sNa)o 3Fe2(Si,Al),010(OH)y nH20, both of which partially dissolve over the course of the experiment. The calcite dissolves according to the following reaction: CaCO3 Ca" + HCO, The silver capsule is sealed and pressurized in a piston cylinder at room temperature for 3 days. In the following questions you can ignore the organic buffer (MES) as well as the dissolved RNA monomers. (1) +2 a. Is this system open, closed, or isolated? What if it is perfectly insulated? b. What are the phases in this system? c. Which of the following is a valid component list for this system? Choose as many as are correct. Explain why those you don't choose, if any, aren't valid component lists. i. CaO - Na2O - Fe2O3 - SiO2- Al203- CO2-H2O ii. Na2O -NaCl- CaO-HCI - Fe203 - SiO2-Al2O3-CO2- H20 ii. CaO - Na2O-HCI-Fe2O3-SiO2- Al203 -CO2 -H20 iv. HCO - Na* - Ca2 - Fe3 - Sio2- Al203-CO2- H20 - H v. NaCI - CaCOs - H2O - (CaOo.sNa)o. 3Fe (Si,Al),Oro(OH)2 nH20

Explanation / Answer

a. The set up is a closed system as you have the components sealed inside a capsule and is kept under pressure in a piston cylinder at room temperature. If the capsule was perfectly insulated then it would become an isolated system as temperature and pressure would not affect it.

b. There are two phases in the system-a solid phase and a liquid phase.

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