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Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
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- 1. H2O; 2. KMnO4 1. O3; 2. DMS; 3. Na2Cr2O7/H2SO4/H2O 1. NaOH, Br2; 2. DMS; 3. H2O/heat 1. O3; 2. DMS; 3. KMnO4 1. DMS; 2. H2O/heatMind Tap - Cengage Learnir X G To analyze the reaction, firs x eploymentid=5735112480241329813180832311&elSBN=9781305862883&id=1774598910&snapshotl... Bb DO: MLM HW 2.5 - Blackbox The following information is given for silver at 1 atm: Tb 2212.00°C Tm= 961.00°C Specific heat solid = 0.2380 J/g °C Specific heat liquid = 0.2850 J/g °C (Select all that apply.) Use the References to access important values if needed for this question. Submit Answer References AHvap (2212.00°C) = 2.355 x 10³ J/g AHfus (961.00°C) = 110.8 J/g A 29.00 g sample of solid silver is initially at 949.00°C. If 3.928 x 10³ J of heat are added to the sample at constant pressure (P = 1 atm), which of the following is/are true? O The sample is a gas. O The sample is a solid in equilibrium with liquid. The sample is at a temperature of 961.00°C. The sample is a liquid. The sample is at a temperature greater than 961.00°C. ng Curves - Calculations: This is group attempt 1 of 10 MacBook Air Bb My Blackboard C Autosaved at…Mind Tap - Cengage Learnin X G To analyze the reaction, firs X Heploymentid=5735112480241329813180832311&eISBN=9781305862883&id=1774598910&snapshot!... Bb DO: MLM HW 2.5- Blackb X At a pressure of 1 atm, point of 78.4 °C. The following information is given for ethanol, C₂H5OH, at 1 atm: boiling point = 78.4 °C AHvap (78.4 °C) = 38.6 kJ/mol AHfus(-115 °C) = 5.02 kJ/mol melting point = -115 °C specific heat liquid = 2.46 J/g°C Submit Answer References Use the References to access important values if needed for this question. Change Energetics: This is group attempt 1 of 10 Bb My Blackboa Autosaved at 9:15 PM Q kj of heat are needed to vaporize a 34.8 g sample of liquid ethanol at its normal boiling
- X app.101edu.co # 3 E UL Week 7: Panopto DII 0 F3 $ R F4 X UL LTU 7-1A Identify the best conditions to complete the SN2 reaction shown below. H % 5 T N3 گیا QL FS A 6 Y Question 18 of 24 40 X F6 & 7 C|Chegg.com U F7 8 A) CH3I, THF B) NaCN, DMSO C) NaN3, ethylamine D) KI, THF X + E) NaN3, DMF PrtScn FB Home ( 9 F9 O ) End 0 & 3 ENG F10 P PgUp - F11 Tp S <10) 1 PgDn D + 6:16 PM 10/18/2022 F12Gven the reaction at 298K: 2 HyS Cg)t SOzlg) 35(5, rhombic) + 2H,0(g) a) Determine AH°rxn AH'oxn= Ky/mol %3D b) If AGn= -102 n7/mul,that is the change in eathaley Asan lin Jlmolk) 45oxn3= J/molK %3D pressule in atm of PH,s it AGrn i and PH,0 - 0. ol00 <)what is the -129 KJ, Psoz = 1.50 atm PHqS= %3D atm %3DReaction Conc, Na,d O3| Cune. HCI 4Als. | AIme (3) Rabe I1.3085840 0.10M •30M 0.4563/64 |0.028 F0913 15 M 12267196 | 0,01870913 30M 1.5360817 0.300349 2 65.56796607 5. 11431671 O.10 M 3 0.050 M 4 0.025 M 0:30M 1.54866|1 1.007568 1,358380874 4. Use experimental data and the rate law to calculate a rate constant for each reaction 1, 2, 3, 4. How do the rate constants compare? Should they be the same or different? Discuss in your conclusions. Report the average value of your calculations. Be sure to include units in your rate constant. -1-4 -2:5 Rate= k [ Naz s03] [Hc1]
- Aktiv Chemistry ← → C tab shift + esc caps lock X https://app.101edu.co ! Aktiv Chemistry 40% Phthalonitrile (CHN) is produced by the ammoxidation of o-xylene (C₂H₁) according to the following reaction: 8 C₂H₁(1) + O₂(g) + NH₂(g) → C₂H₂N₂(s) + H₂O(l) 8 10 8 4 How many moles of water would be produced by the complete ammoxidation of 130.0 grams of o-xylene? 2 F2 N W S #3 20 F3 E X 30 $ 4 X + D 8888 F4 R C LO LO % 5 F F5 T Question 12 of 17 V G Y 7 F7 H B U 00 DII F8 J F9 K 4 N M +/- 1 7 70 I F10دا ← | E 16- ارد و G O CHEMICAL REACTIONS Predicting the products of dissolution FE FAX | | = 1 2 1 0 1 | 2 | 3 | 2 | 2 | H 2 H I H | H H I H I * * * * e https://wwww-awwu.alelks.com/alekscgi/x/isl.exe/1o_u-lgNslkr7j8P3jH-IBMBkpcnaFuOF7Vj... A 53°F Cloudy The names and chemical formulae of some chemical compounds are written in the first two columns of the table below. Each compound is soluble in water. Imagine that a few tenths of a mole of each compound is dissolved in a liter of water. Then, write down in the third column of the table the chemical formula of the major chemical species that will be present in this solution. For example, you know water itself will be present, so you can begin each list with the chemical formula for water (H₂O). Note: "major" chemical species are those present in concentrations greater than 10 mol/L. major species present when dissolved in water 0 0 compound glycerol copper(11) lodide Explanation 7 A methanol 2 2 W formula alt CHO CH, OH Cul, Check 3 H…DETERMINATION OF A,H FOR THE REACTION OF Mg AND HCl Minimize D The results from one run are shown below. 40 00003333333t1&C66C0000000000333333113ttteeccc000000 y = -0.51215 x + 40.274 20 10 4 5 Time (min) Q3 Use the graph to determine Tinitial and Tfinal. You must then use these values to calculate the change in temperature for the reaction. Tinitial (°C) Tinal (°C) AT (°C) 1 2 Temperature (°C) 30
- A 89% (4) E Wed 12:31 PM Edit View History Bookmarks People Tab Window Help Chrome File G standard formation reaction fo x G convert kj to j- Google Search x ALEKS - Jacqueline Hoppenrey x C Search Textbook Solutions | Ch x A www-awn.aleks.com/alekscgi/x/lsl.exe/1o_u-IgNslkr7j8P3jH-IQIHQRDYV_6Ux63SypJXz0Coxvwqgg4JkWI7IUnyRjVNsBjUR5oMNI9R1NdBbh5VEqEfXiSbDcv772zARqYw50M1_Zaol-D2. Jacqueline v O THERMOCHEMISTRY Using specific heat capacity to find temperature change OO C A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 3.60 kg of water at 32.0 °C. During the reaction 106. kJ of heat flows out of the flask and into the bath. -1 ·K Round your Calculate the new temperature of the water bath, You can assume the specific heat capacity of water under these conditions is 4.18 J•g answer to 3 significant digits. dlb Explanation Check 2021 McGraw-Hill Education. All Rights Reserved Terms of Use Privacy Accessibility MacBook Air IItab caps lock x360 fn DSCEA АХ ← → C E -H ● esc O CHEMICAL REACTIONS Using a chemical equation to find moles of product from moles... Explanation V 64°F Sunny 1 H 12 ? 1 Q A CP=112 Tha HH CHLH LC 1/14 C/ 1 L/ https://www-awu.aleks.com/alekscgi/x/lsl.exe/10_u-IgNsikr7j8P3jH-IBMBkpcnaFu0F7Uj... A Ammonium perchlorate (NH CIO) is a powerful solid rocket fuel, used in the Space Shuttle boosters. It decomposes into nitrogen (N₂) gas, chlorine (Cl₂) gas, oxygen (O₂) gas and water vapor, releasing a great deal of energy. Calculate the moles of ammonium perchlorate needed to produce 0.095 mol of water. Be sure your answer has a unit symbol, if necessary, and round it to 2 significant digits. 0 Z F Check # 2 "3 W S " X T H 0 E 44 $ 4 8 0.2 0.0 0² R X DE C % do 5 T Ś G A 4- 6 Y & 7 H np V B N 1 8 J ( M n a s 9 K TO DDI ✓ ) B L Aan MC → الالالالــالـال ▬▬▬1/5 n MC AMC + A 23 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility 4:33 PM 10/22/2022 . U ? + 7 prt…ll T-Mobile Wi-Fi ? 2:31 PM @ 7 51% 23obrienm Fer... CHE222 Ch 9.2 Balancing & Classifying Chemical Reactions Types of Chemical Reactions Balancing Chemical Reactions 1)_ N, + H, - NH, 2) KCIO, → _ KCl + O, 3) NaCl + F, -__ NaF + Cl, 4) Н, + H̟0 5) _CH, + 0, →. СО, + H,O 6) _C,H, +_ 0, → __CO, + H,0 7) С,Н, + 0,- _CO, + H,0 8) P + _0, → __P,O, 9) Na + H,O → NaOH + H, 10) Ag,O → __Ag + _0, 11) S, + _SO, 12) K + MgBr,→ KBr + _Mg