Argon gas is heated to 35 °C and then cooled to 10 °C. The gas is then brought back to its original state. Has the gas undergone an enthalpy change? Explain.

Sorry i dont understand the question can you rephase it?

Green is technically every other color but green but the other wavelengths of the other colors get absorbed by the object and the wavelength of the color green gets reflected

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.