The volume of a sample of helium is 4.5 mL at 15.0°C and 215.0 kPa. What will its final volume be in the figure if the final pressure is 205 kPa and the final temperature is 20°C 4.8 mL​

Yes you are correct use the scientific method

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.

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