b) NaOH, H₂O 2 H₁C H 100°C

[References] Given the following data СэНа (9) + 302(9) — 2 СО2(9) + 2Н,0() 2C2 H6 (g) + 702(9) → 4 CO2(g) + 6H2O(1) 2H2 (g) + O2 (g) → 2H2 O(1) ΔΗ -1411.0 kJ AH = -3119.8 kJ AH=-571.7 kJ calculate A H for the reaction C2H4 (9) + H2 (g) → C2H6 (9) ΔΗΞ kJ Submit Answer Try Another Version 3 item attempts remaining

5. Which one of the following equations represents the formation reaction of ethanol, CH3CH2OH (/). (a) 2C(g) + 2H2(g) + 1/202(g) → CH3CH2OH() (b) 2C(g) + 6H(g) + O(g) → CH3CH2OH (1) (c) 2C(graphite) + 6H(g) + O(g)-> CH3CH2OH (/) (d) 2C(diamond)+ 6H(g) + O(g)-> CH3CH2OH() (e) 2C(graphite)+ 3H2(g) + 1/202(g) → CH3CH2OH(/) Select the correct answer:

Order these chemical species by increasing pH of an 0.1 M aqueous solution of each. That is, imagine making an 0.1 M solution of each species. Select1 next to the species that makes the solution with the lowest pH. Select 2 next to the species that makes the solution with the next higher pH, and so on. Notice that some of the rankings have been filled in for you already. Also notice that water is on the list. For that particular case, just compare the pH of pure water to the pH of the other solutions. Note for advanced students: for all charged species, you may assume the necessary counterions act as neither acids nor bases. relative pH of 0.1 M aqueous solution species H20 4 H,PO4 HNO, (Choose one) NO2 7 OH (Choose one) HF (Choose one) ▼

Given the following two reactions and corresponding enthalpy changes, CO(g) + SiO2 (s) – SiO(g) + CO2(g) ΔΗ -+520.9 kJ 8 CO2(g) + Si3N4(s) → 3 SiO2(s) + 2 N20(g) + 8 CO(g) ΔΗ+461.05 k] compute the AH of the reaction 5 CO2(g) + Si3N4(s) → 3 SiO(g) + 2 N,O(g) + 5 CO(g)

500.0 mL of 0.100 mol·L HCl(aq) was added to a high quality insulated calorimeter containing 500.0 mL of 0.100 mol·LNaOH(aq). Both solutions had a density of 1.000 g·mL and a specific heat of 4.184 J·g ·K . The calorimeter had a heatcapacity of 850.0 J·K . The temperature of the entire system rose from 25.50 C to 26.05 C.Calculate the heat of reaction.   Thank you!

The enthalpy changes, AH, for three reactions are given. H, (g) + 0,(g) → (3)° Ca(s) + 2 H*(aq) H,O(1) AH = -286 kJ/mol Ca?+(aq) + H, (g) ΔΗ -544 kJ/mol > СаO(s) + 2 H*(аq) — Са?* (аq) + Н,0() AH = -193 kJ/mol Using Hess's law, calculate the heat of formation for CaO(s) using the reaction shown. 1 Са(s) + -0,(g) CaO(s) 2 ΔΗ kJ/mol

Enter a molecular equation for the reaction of acetic acid, CH3 COOH, with zinc. Express your answer as a balanced chemical equation. Identify all of the phases in your answ .0 ΑΣΦ ? A chemical reaction does not occur for this question.

Most of the coal available in the United States is bituminous or "soft" coal, which contains as much as 5% sulfur by weight. When this coal is burned, the sulfur reacts with oxygen to form sulfur dioxide gas. When the sulfur dioxide gas dissolves in raindrops, it forms sulfuric acid. This is how we get acid rain. Here is the reaction that produces sulfur dioxide gas when soft coal is burned: (s)+802(g) 880, (g) Suppose an engineer decides to study the rate of this reaction. He prepares four reaction vessels with 112.8 g of solid sulfur and 49.4 g of oxygen gas each. The volume and temperature of each vessel is shown in the table below. olo Arrange the reaction vessels in decreasing order of initial rate of reaction. In other words, select a "1" next to the vessel in which the engineer can reasonably expect the initial rate of reaction to be highest, a "2" next to the vessel in which the initial rate of reaction would be next highest, and so on. Ar initial rate of vessel volume…

2 (a) In this investigation, you will use a polystyrene-cup calorimter to determine the amount of heat released during acid-base neutralization reactions. Find information in your textbook, an encyclopedia, or a web site about calorimetry. Sketch the apparatus for a polystrene-cup calorimeter. (b) For more precise heat of reaction measurnments, chemists use a device called bomb calorimeter. How is a bomb calorimeter similar to and different from a polystyrene-cup calorimeter?