Coal Is Converted into Cleaner, More Transportable Fuels by Burning

question 94

Multiple Choice

Coal is converted into cleaner, more transportable fuels by burning it with oxygen to produce carbon monoxide. The carbon monoxide then is reacted with hydrogen using a catalyst to produce methane and water. Is the reaction between CO and H₂ exothermic or endothermic, and what is the change in enthalpy for it? The enthalpies of formation of the reactants and products are given below. $$\begin{array} { c c } \text { Molecule } & \boldsymbol { \Delta H } \\& \circ \\& \mathrm { f } \\ & \text { in kJ/mol } \\\mathrm { CO } & - 110 \\\mathrm { H } _ { 2 } & 0 \\\mathrm { CH } _ { 4 }& - 75 \\\mathrm { H } _ { 2 } \mathrm { O } & - 242\end{array}$$

• A) exothermic, +317 kJ/mol
• B) endothermic, +207 kJ/mol
• C) exothermic, - 427 kJ/mol
• D) endothermic, +427 kJ/mol
• E) exothermic, -207 kJ/mol

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Definitions:

Rotor

The rotating part of an electric motor or generator, which turns due to interaction with the magnetic field.

Standard Direction

A reference direction considered as a basis for measurement or operation, typically referring to the flow of current or rotation.

Counter-Clockwise

A directional term describing movement opposite to the direction in which the hands of a clock move; typically used to indicate a specific orientation or rotation direction.

Drive

A device or system that applies force to control the speed, direction, and form of movement for a piece of equipment.