Answer
Standard state of a material means a reference point used to calculate its properties under different conditions.
standard states of given substances at 298 K are:
H2O (water): liquid
NaCl(sodium chloride):solid
Hg (mercury):liquid ( only metal that has liquid standard state.)
CH4(methane):gas
Work Step by Step
Standard state of a material means a reference point used to calculate its properties under different conditions.