The standard heat of combustion of ethanol, c2h5oh, is 1372 kj/mol ethanol. How much heat (in kj) would be liberated by completely burning a 20. 0 g sample?.

What does the symbol (–hfus) indicate in a phase change?

Glucose (c6h12o6) is an important biological molecule. (round the answer to nearest hundredth.) what is the percent by mass of carbon in glucose?

The equation below shows a chemical reaction. a + b + heat —> c + d according to the law of conservation of energy, which statement is true? a. the reactants absorb heat because they have less energy than the products. b. the products release heat because they have more energy than the reactants. c. the reactants generate heat because they have more energy than the products. d. the products require heat to form because they have less energy than the reactants.