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The weight won't change a bit. Weight is proportional to mass, which is related to the amount of matter, and matter may be neither created nor destroyed. However, the denisty of the gas changes. It becomes less dense as it heats up. Put another way, a gallon of warm gasoline will weigh less than a gallon of cold gas. The volumes are the same, but since the densities are different, they don't have the same weight. But if you started with, say, 10 pounds of gas, you would still have ten pounds of gas no matter what its temperature. BTW, when pilots fuel their planes, they measure the fuel in pounds rather than gallons. A thousand pounds of fuel is a thousand pounds of fuel no matter what its temeprature, so the pilot can determine whether or not he can make his destination without having to throw mama from the plane.
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∙ 17y ago
Wiki User
∙ 15y agoIf you have bought a given amount of gas, say 20 gallons, at 5 degC and then go to an area where it is say 30degC, that gas will weigh exactly the same as when you bought it. However if you buy it from the pump at 30degC, one gallon will weigh less than it would at 5 degC, because liquids expand when heated, and become less dense. The difference is not great, but it is a feature of buying it by volume not weight.
Wiki User
∙ 16y agoThe volume area increases causing density to decrease while the total mass does not increase.
Wiki User
∙ 13y agothe mass is the same. so neither
Liquids Weighs MORE when cold as it is more dense
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Does a hot or cold object weigh more?
wow what a question!! well i don't know but hot air rises so cold would probably weigh more..
Does gravity increase or decrease when heat increases?
No. You don't weigh more or less on a hot or cold day.
Is statch more soluble in hot or cold water?
hot water
Which provide more vapor in a bottle hot water or cold water?
hot
What vibrates more hot or cold particles?
yes they do
Does a hot or cold object weigh more?
wow what a question!! well i don't know but hot air rises so cold would probably weigh more..
Does gravity increase or decrease when heat increases?
No. You don't weigh more or less on a hot or cold day.
Why does hot coffee weigh more than cold coffee?
sugar dissolves faster in hot coffee because the temperature makes it melt quicker than the process of cold coffee.
Dose cold water weigh from hot water?
Cold water is weigh from hot water; as the molecules tend to free (or expand) by getting heat, which causes increase in specific volume (i.e. decrease in density). As a result, hot water becomes lighter, compared to cold.
Do hot stars or cold stars live longer?
There is no such thing as a cold star, as even the lowest-temperature stars are very hot. That said, cooler stars last longer as they burn their fuel more slowly.
What has more energy something hot or something cold?
Hot things have more energy than cold one.
What does the water temp sensor do on a 77 280z?
the coolant temp sensor tells an on board computer (ECU) to ajust fuel mixture based on how hot or cold the engine is (hot engines require less fuel, cold engines more). if the sensor gets dirty or disconnected it will flood the engine with fuel and cause the car to run very poorly or not at all.
Does cold water weigh less than hot water?
No, cold water weighs more (for a given volume) than hot water. This is why there is a thermocline in bodies of water. But when water freezes, the solid form weighs even less (for a given volume), this is why ice floats.
Which wakes you up more cold or hot water?
Cold
Which has more sediment hot or cold water?
Normally Hot
When does an object have more thermal energy when it is hot or cold?
Hot.
What causes an engine to idle high when cold and reduces a bit when hot?
the cylinders are tight and is pulling more fuel then normal on a efi motor, older cars,trucks with chokes pull more fuel till it is warmed up
