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QUESTION 12 The energy required to disrupt a liquid drop and spread the material out as a film is called a. adhesive energy b, viscosity c, cohesive energy d. surface tension e meniscus curvature QUESTION 13 The enthalpy change for condensation is equal but opposite in sign to the enthalpy of vaporization. Is this statement true or false? True False
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By definition, the energy required to break through the surface or to disrupt a liquid drop and spread the material out as a film is called Surface tension. Due to surface tension, water drops appear as spheres. Option D is the right answer. The enthalpy of vapourization is the energy required when the liquid converts into vapour. This is an endothermic process. The enthalpy of condensation is the energy released when the vapor converts to liquid. This is an exothermic process. This is opposite to enthalpy of vapourization. ΔΗ, -ΔΗ condenation vap TRUE is the right answer.

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