24. what are the reactants?\n25. what are the products?\n26. what would the chemical equation for this…

24. what are the reactants?\n25. what are the products?\n26. what would the chemical equation for this reaction be?\n27. what is the enthalpy change (δh) for this reaction?\n28. is the overall reaction as shown above exothermic or endothermic? how do you know?

24. what are the reactants?\n25. what are the products?\n26. what would the chemical equation for this reaction be?\n27. what is the enthalpy change (δh) for this reaction?\n28. is the overall reaction as shown above exothermic or endothermic? how do you know?

Answer

Explanation:

Step1: Identify reactants

Reactants are substances at start. Here, they are $2H_2(g)$ and $O_2(g)$.

Step2: Identify products

Products are substances at end. Here, it is $2H_2O(g)$.

Step3: Write chemical equation

Combining reactants and products with an arrow gives $2H_2(g)+O_2(g)\rightarrow2H_2O(g)$.

Step4: Determine enthalpy change

Given $\Delta H = - 486.3\ kJ$.

Step5: Classify reaction type

Since $\Delta H<0$, heat is released, so it is exothermic.

Answer:

  1. $2H_2(g)$ and $O_2(g)$
  2. $2H_2O(g)$
  3. $2H_2(g)+O_2(g)\rightarrow2H_2O(g)$
  4. $\Delta H=-486.3\ kJ$
  5. Exothermic; because $\Delta H < 0$