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The following statements is true only un...

The following statements is true only under some specific conditions. Write the conditions for the following statement in not more than two sentences. The heat energy q absorbed by a gas is `DeltaH`.

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The heat energy q absorbed by a gas is `DeltaH` if heat is absorbed at a constant pressure. The heat energy q absorbed by a gas is `DeltaU` if heat is absorbed at a constant volume.
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