What is taking place in a reaction as the curve on a reaction pathway graph goes up? . a. heat is being released.. b. heat is being absorbed.. c. the reaction has stopped.. d. the reaction is slowing down.

B.Heat is being absorbed

Explanation:

A reaction pathway graph is essentially a plot of the reaction coordinate on the x-axis Vs the potential energy on the y-axis.

If the reaction progresses with an upward moving curve, this suggests that heat is being absorbed and the energy of the system increases. if the curve slopes downwards, this suggests that heat is being released.

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