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For the reaction CO(g) + 2H2(g) -> CH3OH(l), a condition of 340 atm is written above the arrow. What does this represent?

Question
For the reaction CO(g) + 2H2(g) -> CH3OH(l), a condition of 340 atm is written above the arrow. What does this represent?
The temperature of the reaction
The pressure at which the reaction occurs
The volume of gas produced
The mass of the catalyst
Answer
The pressure at which the reaction occurs
Detailed Explanation
Reaction conditions such as pressure, temperature, or a catalyst are sometimes written above or below the arrow -- here, 340 atm indicates the pressure.
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