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Identify the following as an endothermic or exothermic with proper explanation.
If you place an ice cube on a watch glass for two minutes, is it endothermic or exothermic? support with evidence. Also, mention if there is any phase change in the reaction.

According to google It's just an Endothermic process.

I hope i helped

Explanation:

Since the ice cube needs energy to vibrate its particles to a higher state to meet the higher state of the water it is in. So if absorbs the heat energy. Hence, Endothermic.

може ли да зареждате повече информация, моля

answer : (a) volume of the gas = 8.67 ×   l

                (b) second virial coefficient b = -1.21226 l/mole

solution :   given,     t = 300k

                                p = 20atm

                                z = 0.86

                                n = 8.2 mmoles = 8.2 × moles

                                r =   0.082 l atm/k/mol

        find,     (a) volume of gas   and (b) second virial coefficient b at 300k.

formula used :            

                          and            

(a)            

                    = \times 0.082\times 300}{20}[/tex]

                    = 8.67 ×   l

(b)      

                    = (0.00867-1) × 8.659

                    = - 8.5839 l/mole