4.
The combustion (burning) of Carbon Monoxide is represented by the following equation
CO(g) + 1/2 O$_2$(g) $\rightarrow$ CO$_2$(g)
Substance
CO(g)
CO$_2$(g)
Standard Enthalpy (Heat) for Formation
$\Delta H^\circ_f$ (kJ/mole)
-110.5
-393.5
a. Standard Enthalpy (Heat) for Formation, $\Delta H^\circ_f$, is defined as the heat/energy involved when 1 mole
of a substance is formed from its elements. Write the (balanced) formation reaction for CO(g) and
CO$_2$(g) from its elements. (2pts)
b. Using the 2 formation reactions written in part (a), determine the heat of reaction, $\Delta H^\circ$, for the
combustion of Carbon Monoxide shown above. (Show set up and canceling of reactions) (2pts)
c. A 25.0 g sample of a metal at 100.0°C is dropped into 120.0 g of water at 22.0°C. What is the final
temperature of the water-metal mixture? Specific heat capacity of water is 4.18 J/(g°C) and metal
is 0.343 J/(g°C). Assume no heat is lost to the surroundings. (3pts)
