For the process ${\mathrm{CO}}_2\left(\mathrm{s}\right)\to {\mathrm{CO}}_2\left(\mathrm{g}\right)$

${\mathrm{CO}}_2\left(\mathrm{s}\right)\to {\mathrm{CO}}_2\left(\mathrm{g}\right)$
Sublimation process heat is absorbed $∆$H =+ve
and no.of moles of gaseous substance increased $∆$S =+ve