Next, 4.860 of ethanol (C,H, OH) are put into the "bomb" and similarly completely burned in an excess of oxygen. This time the temperature of the water rises from 19.00 PC to 45.91 °C. Use this information, and any other information you need from the ALEKS Data resource, to answer the questions below about this reaction: C,H,OH(1) + 30,(g) – 200,(g) + 3H,O (g) Be sure any of your answers that are calculated from measuured data are rounded to the correct number of significant digit Note for advanced students: it's possible the student did not do these experiments sufficiently carefully, and the values yo published values for this reaction. exothermic Is this reaction exothermic, endothermic, or neither? O endothermic O neither If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in the second experiment. kJ Calculate the reaction enthalpy AH per mole of C,H,OH. mol

A scientist measures the standard enthalpy change for the following reaction to be -351.2 kJ : P,O10(s) + 6 H,O(1)- →4H3PO (aq) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of P¾010(s) is kJ/mol. Submit Answer Retry Entire Group 8 more group attempts remaining

A chemist measures the enthalpy change AH during the following reaction: Sg(s) + 24 F,(g)→8 SF(g) AH=-9672. kJ Use this information to complete the table below. Round each of your answers to the nearest kJ/mol. reaction ΔΗ 10 SSF, (3) → S, (3) + 24F, (z) S,6) + 6F, (g) 2SF, (3) 4 4 SF, (e) -- S,(1) + 4F, (3)

nuraipy changes in chemical reactions Read through pages 18-20 in your laboratory manual for information on how to calculate the enthalpy change in a solution. Part A - Calculating ms In a calorimetry experiment 5.6 g of potassium hydroxide is dissolved in 400 mL water in a thermos flask. The temperature increase in the solution is 7 °C. The effective mass of the glass in the thermos flask (mcal) is 0.040 kg. The heat capacity of the solution (Cs) is 4.04 kJkg-¹K-1¹. The heat capacity of the calorimeter (Ccal) is 0.387 kJkg-¹K-1. Remember to enter your answer using the specified number of significant figures, but keep the entire number in your calculator for use in further calculations. Calculate the total mass of solution in kilograms (ms) Give your answer to four significant figures. ▾ View Available Hint(s) Hint 1. Calculating ms mg = mass water (kg) + mass solute (kg) —| ΑΣΦ Submit Request Answer ? kg < Pear 10

Please answer both questions as they are calculated together but just a heads up they are different questions. Thank you for helping me

We can use Hess's Law (and some creativity!) to learn about the energetics of reactions that occur in remote environments. Consider the atmospheric reaction,  NO + O → NO2   (a) Use the dissociation energy of O2, 498.34 kJ/mol, and the standard heats of formation for NO (+90.25 kJ/mol) and NO2 (+33.18 kJ/mol) to derive the enthalpy change for this reaction.

A student dissolves 14.0 g of ammonium nitrate (NH4NO3) in 200. g of water in a well-insulated open cup. He then observes the temperature of the water fall from 22.0 °C to 16.6 °C over the course of 5.5 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: NH4NO₂ (s) NH(aq) + NO3(aq) - You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to the correct number of significant digits. Note for advanced students: it's possible the student did not do the experiment carefully, and the values you calculate may not be the same as the known and published values for this reaction. Is this reaction exothermic, endothermic, or neither? If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case. Calculate the reaction enthalpy AHxn per mole…

CHAPTER 5 - PRINCIPLES OF CHEMICAL REACTIVITY: EN Previous Page 3 of 5 endothermic ✓ exothermic When 1 mole of I2 (g) reacts with Cl₂ (g) to form ICI(g) according to the following equation, 26.8 kJ of energy are evolved. 1₂ (9) + Cl₂ (9) → 21C1(g) What is the value of q? kJ NOV 11 Next → othermic or exothermic? #tv ♫ P 100 Use the References to access DO Cengage Learning | C MacB

A chemist measures the enthalpy change AH during the following reaction: 2 Al(OH),(s)→Al,03(s) + 3 H,0(1) ΔΗ-41. kJ Use this information to complete the table below. Round each of your answers to the nearest kJ/mol, reaction ΔΗ 4AI(OH), (3) → 2Al,0;(s) + 6H,0(1) 82 kJ Al,0, (;) + 3H,0(1) → 2A1(OH), (s) -41 kJ Al,0, () + H,0() -- AI(OH), (-)

Given the reactions, X(s) + ¿0,(g) – XO(s) AH = -527.1 kJ XCO,(s) → XO(s) + CO,(g) ΔΗ +261.3 kJ what is AH for this reaction? X(s) + ¿0,(g) + CO,(g) XCO,(s) ΔΗ- kJ