THE THERMOOSMOTIC EFFECT IN WOOD

Water vapor pressures computed from stationary state data for moist wood (Choong 1963) are used to infer changes in the logarithm of vapor pressure per unit change in Kelvin temperature, d ln p/dT, for comparison with corresponding values from a thermodynamic model. The model evaluates the overall heat of transfer associated with passage of vapor through wood, and hence quantifies the thermoosmotic effect. Results of the comparison verify the existence of a constant vapor entropy for wood in the stationary state.