Using the following thermochemical data, what is the change in enthalpy for the following reaction: 3h2(g) + 2c(s) + ½o2(g) → c2h5oh(l) c2h5oh(l)+3o2(g)→2co2(g)+3h2o(l), δh = –1367 kj/mol c(s)+o2(g)→co2(g), δh = –393.5 kj h2(g)+½o2(g)→h2o(l), δh = –285.8 kj

Which of the following best explains why the end of a spoon sticking out of a cup of hot water also gets hot? question 7 options: the heat from the hot water is conducted through the spoon handle the hot water heats the air surrounding the upper part of the spoon. the hot water causes a physical change in the spoon handle. the hot water causes a chemical reaction to take place in the spoon.

Sugar is dissolved in water. which is the solute? sugar neither both water

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.