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9 May, 22:47

How hot would a 2.3 L balloon have to get to expand to a volume of 3.0 L? Assume the initial temperature of the balloon is 24 °C, and that the pressure inside the balloon remains constant. A. 3 K B. 42 K C. 128 K D. 390 K

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  1. 9 May, 22:57
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    This question calls for Charles' Law (one of the gas laws) because it deals with volume and temperature of a gas. Charles' Law is as follows:

    V₁/T₁ = V₂/T₂

    Just plug in what you know! The initial volume and temperature (V₁ and T₁) are 2.3L and 24⁰C. The final volume (V₂) is 3.0L. Solve for T₂ algebraically:

    2.3/24 = 3.0/T₂ * cross multiply here

    2.3T₂ = 72

    T₂ = 31.3⁰C

    Now, convert to Kelvin by adding 273 to the temperature.

    31.3 + 273 = 304.3K

    The answer must be D because that is the only option where the balloon would reach at least 3.0L.
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