A marginal emission factor is the best representation to estimate which fossil-fired units EE/RE are displacing across the fossil fleet. Calculating the emission impacts of EE and RE on the electricity grid requires estimating the amount of fossil-fired generation and emissions being displaced by EE and RE. Most users of the Equivalencies Calculator who seek equivalencies for electricity-related emissions want to know equivalencies for emissions reductions from energy efficiency (EE) or renewable energy (RE) programs. national weighted average CO 2 marginal emission rate to convert reductions of kilowatt-hours into avoided units of carbon dioxide emissions. The Greenhouse Gas Equivalencies Calculator uses the AVoided Emissions and geneRation Tool (AVERT) U.S. These are calculated using GWPs from the Intergovernmental Panel on Climate Change’s Fourth Assessment Report. Go to the equivalencies calculator page for more information.Ī note on global warming potentials (GWPs): Some of the equivalencies in the calculator are reported as CO 2 equivalents (CO 2E).
MOLAR MASS OF CO2 TRIAL
The sample for Trial 1 evolved 0.2222 g CO2.This page describes the calculations used to convert greenhouse gas emission numbers into different types of equivalent units. The actual mass of carbonate in the sample used for Trial 1 must first be calculated, before the percent carbonate can be determined. Percent Carbonate in Unknown (for Trial 1) Calculate the mass of CO2 evolved for Trial 1 above, then click here to check your answer.ģ. For the table of data above, the mass of carbon dioxide evolved represents the difference between the (mass of beaker, tube, HCl, sample before reaction) and the (mass of beaker, tube, HCl, sample after reaction). The mass of CO2 evolved represents the change in mass before and after the reaction (i.e., when the acid was transferred from the pipet to the carbonate sample). Using the data above, calculate the mass of carbonate sample for Trial 1, then click here to check your answer. The mass of carbonate sample added to the test tube for Trial 1 will be the difference in mass between the (mass of beaker, tube, HCl, sample before reaction) and the (mass of beaker, tube HCl). For example, if a carbonate sample decreases in mass by 0.2571 g when treated with acid, then the sample must have contained the following amount of carbonate ion: In this experiment, we determine how much carbonate ion is present in a sample by measuring the loss in mass (which represents the CO2 that escapes) when acid is added to the sample. When a compound containing the carbonate ion is treated with an acid, the following net reaction occurs:ĬO2 is a gas and is lost from the carbonate sample when the acid is added to the sample. If you are not careful in this experiment, or if you hurry the experiment because it seems so "easy" to perform, you will receive poor agreement between your three determinations and you will receive a poor grade on your lab report. Although you will make three determinations of your sample, realize that the percent carbonate calculated for your sample should be the same (within reasonable experimental error) for each of the determinations. In this experiment you will be given a sample of an "unknown" carbonate, and you will determine what percentage (by mass) of carbonate ion the compound contains. "Carbonates" are compounds which contain the carbonate ion, CO32.
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