Propane gas and liquid are denser at cooler temperatures. Because there is more mass per unit of volume, the cooler the temperature, the ______________ propane you can add to the tank before it is 100 percent full.

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Incorrect. Liquid propane will expand as it absorbs heat and contract as it loses heat. So, the cooler the temperature, the more propane you can add to the tank before it is 100 percent full.

Yes! Liquid propane will expand as it absorbs heat and contract as it loses heat. So, the cooler the temperature, the more propane you can add to the tank before it is 100 percent full.