1) Based on the graph, the saturation vapor pressure is determined to be
23.4mb
2) In the art gallery when the relative humidity fell to 26%, the vapor pressure is calculated as
RH = (VP/SVP)*100 26 (VP/23.4) *100 = 6.084
3) The dewpoint temperature in the art gallery when the relative humidity dropped to 26% is calculated as
Td= 68- ((100-26)/5) = 53.2
B)
It increases by 45%
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