For the following example, identify the following. 2H2(g) + O2(g) → 2H2O(g)1. a positive ΔH and a positive ΔS2. a positive ΔH and a negativeΔS3. a negative ΔH and a positive ΔS4. a negative ΔH and a negative ΔS5. It is not possible to determine without more information.

Construct the hypothetical phase diagram for metals a and b between room temperature (20c) and 700c, given the following information: * the melting temperature of metal a is 480c. • the maximum solubility of b in a is 4 wt% b, which occurs at 420c. • the solubility of b in a at room temperature is 0 wt% b. • one eutectic occurs at 420c and 18 wt% b–82 wt% a. • a second eutectic occurs at 475c and 42 wt% b–58 wt% a. • the intermetallic compound ab exists at a composition of 30 wt% b–70 wt% a, and melts congruently at 525c.• the melting temperature of metal b is 600c. • the maximum solubility of a in b is 13 wt% a, which occurs at 475c. • the solubility of a in b at room temperature is 3 wt% a.

Based on the equation and the information in the table, what is the enthalpy of the reaction?

The best solution for preventing harm to people and pets from severe hurricanes involves determining and warning residents about what