1a. What is vapor pressure and why does it change with temperature? 1b. What is

Question

1a. What is vapor pressure and why does it change with temperature?
1b. What is enthalpy of vaporization?
1.cThe assumption was made that the vapor pressure of water is negligible at a temperature close to zero. Find the actual vapor pressure at your low temperature and comment on the validity of the assumption.
1.D The assumption was also made that the slight changes in "h", the depth under the surface of the water, will not significantly change the total pressure in the graduated cylinder. Comment on the validity of this assumption
1a. What is vapor pressure and why does it change with temperature?
1b. What is enthalpy of vaporization?
1.cThe assumption was made that the vapor pressure of water is negligible at a temperature close to zero. Find the actual vapor pressure at your low temperature and comment on the validity of the assumption.
1.D The assumption was also made that the slight changes in "h", the depth under the surface of the water, will not significantly change the total pressure in the graduated cylinder. Comment on the validity of this assumption

1b. What is enthalpy of vaporization?
1.cThe assumption was made that the vapor pressure of water is negligible at a temperature close to zero. Find the actual vapor pressure at your low temperature and comment on the validity of the assumption.
1.D The assumption was also made that the slight changes in "h", the depth under the surface of the water, will not significantly change the total pressure in the graduated cylinder. Comment on the validity of this assumption
1b. What is enthalpy of vaporization?
1.cThe assumption was made that the vapor pressure of water is negligible at a temperature close to zero. Find the actual vapor pressure at your low temperature and comment on the validity of the assumption.
1.D The assumption was also made that the slight changes in "h", the depth under the surface of the water, will not significantly change the total pressure in the graduated cylinder. Comment on the validity of this assumption

Explanation / Answer

Ans. 1a. Vapour pressure can be defined as the partial pressure that is applied by the vapour on the surface of the liquid. With increase in temperature, vapour pressure increases because more vapour will be form at higher temperature and hence more pressure will be applied due to more no. of molecules in vapour state.

Ans1b, Enthalpy of vapourization means energy or heat to vapourize 1 mole of liquid into vapour form.

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