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90 g of water spilled out from a vessel ...

90 g of water spilled out from a vessel in the room on the floor. Assuming that water vapour behaving as an ideal gas, calculate the internal energy change when the spilled water undergoes complete evaporation at `100^(@)C`. (Given the molar enthalpy of vaporisation of water at 1 bar and 373 K = 41 kJ `mol^(-1)`).

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To solve the problem of calculating the internal energy change when 90 g of water evaporates at 100°C, we can follow these steps: ### Step 1: Calculate the number of moles of water To find the number of moles of water, we use the formula: \[ \text{Number of moles} = \frac{\text{Given mass}}{\text{Molar mass}} \] Given: ...
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