Exercise 1: Hydrogen \( \left(\mathrm{H}_{2}\right) \) and oxygen \( \left(\mathrm{O}_{2}\right) \) react to form water \( \left(\mathrm{H}_{2} \mathrm{O}\right) \). Write and balance the equation for this reaction.

5 What is meant by the term hygroscopic when referring to brake fluid?

During a reaction, the enthalpy of formation of an intermediate is -286 \( \mathrm{~kJ} / \mathrm{mol} \). During the reaction, 2 moles of the intermediate are produced. What is the enthalpy value for this step of the reaction? A. -572 kJ B. 572 kJ C. 286 kJ D. -286 kJ

What does word root indicate in IUPAC name? b. Write the suffix for doubly bonded \( (\mathrm{C}=\mathrm{C}) \) alcohol. c. Ifsame substituent is repeated thrice, which prefix is added to word root? \& Write IUPAC name of \( \mathrm{CH}_{3}-\mathrm{CH}(\mathrm{CI})-\mathrm{CH}_{2}-\mathrm{COOH} \). e. Which group is selected as suffix if -OH and -CHO both are present in the compound?

Which is the correct Lewis structure for acetylene (\(C_ { 2} H_ { 2} \))?

At what temperatures is an exothermic reaction spontaneous? A. At higher temperatures when the change in entropy is negative B. At no temperatures C. At all temperatures all the time D. At all temperatures when the change in entropy is positive