Using the information in Model 2, calculate ΔHrxn for the combustion of ethanol (C2H5OH(l)). Substance H f (KJ/mol)
CO2 (g) –393.51
H2O(l) –285.83
C2H5OH (l) –277.69

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".

your answer is c) plasma

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