Answer to Question #65820 in Physical Chemistry for umar

Question

Question 1 : Of the following product-favoured processes, which are endothermic? 1. the combustion of methane to produce water and carbon dioxide. 2. the expansion of an ideal gas. 3. the melting of ice at temperatures greater than 0ºC.
3 only
2 and 3
2 only
1 only

Question 2 : All of the following statements concerning entropy are true EXCEPT
a positive change in entropy denotes a change toward greater disorder.
entropy is zero for elements under standard conditions.
entropy is a state function.
entropy values are greater than or equal to zero

Answer 1

Question 1 : Of the following product-favoured processes, which are endothermic? 1. the combustion of methane to produce water and carbon dioxide. 2. the expansion of an ideal gas. 3. the melting of ice at temperatures greater than 0ºC.
2 and 3

Question 2 : All of the following statements concerning entropy are true EXCEPT
entropy is zero for elements under standard conditions.