Problem: Consider the two diagrams below.Based on (i), write an equation showing how HA is related to HB and HC.

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The chart shows the enthalpy (H) change A, B and C.


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Problem Details

Consider the two diagrams below.
(i) A is the increase in enthalpy from an initial low state to a high state in one step. B is an increase from the initial low state to an intermediate state, followed by C, which increases from that intermediate state to the final high state. (ii) X is the increase in enthalpy from an initial low state to a high state in one step. Y is a decrease in enthalpy from that high state to an intermediate state; Z is an increase from the initial state to that same intermediate state.

Based on (i), write an equation showing how HA is related to HB and HC.