Energy. Energy transfer occurs between a system and its surroundings. System = piece of the universe. Energy. Two types: heat and work. Energy. Heat = energy transfer that is the result of contact between two substances of differing temperatures. Energy.
How much energy is required to raise the temperature of 2.50g of water from -3.00 C to 108.00 C?
qtot = 7.58 kJ
Ex: step 1 - C(s) + 1/2 O2(g) --> CO(g); step 2 - CO(g) + 1/2 O2(g) --> CO2(g) H = -283.0 kJ; Hnet = (-393.5 kJ). What is the net equation and the H of the first step?
H1 = -110.5 kJ, C(s) + O2(g) --> CO2(g)