Without referring to tables, predict which of the following has the higher enthalpy in each case.

(a) 1 mol CO2(s) or 1 mol CO2(g) at the same temperature.
(b) 2 mol of hydrogen atoms or 1 mol of H2.
(c) 1 mol H2(g) and 0.5 mol O2(g) at 25 °C or 1 mol H2O(g) at 25 °C.
(d) 1 mol N2(g) at 100 °C or 1 mol N2(g) at 300 °C.

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.

One or more substances changing into one or more substances is an example of a

What diagram shows the ionic compound of magnesium oxide