The saturaion pressures at the given temperatures are
@$P_s(5^o C)=872.6 Pa,\\ P_s(16^o C)=1818.8 Pa,@$
The relative humudity is given by
@$\phi=\frac{P_s(5^o C)}{P_s(16^o C)}\\ \phi= \frac{872.6}{1818.8}=0.480@$
The specific humidity is given by
@$x=\frac{P_s(5^o C)}{P-P_s(5^o C)}\\ x= \frac{872.6}{1.013\times10^5-872.6}=0.0054 kg/kg.@$
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