Reaction 1 is divided by 2 and inverted, then added to reaction 2, the enthalpy change is calculated:
ΔH = - ΔH1 / 2 + ΔH2 = - (-196 / 2) + (-285.8) = -187.8 kJ
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Hydrogen peroxide, H2O2, is a colorless liquid whose solutions are used as a bleach and an...
Exam Hydrogen peroxide, H202, is a colorless liquid whose solutions are used as bleach and an antiseptic. H2O2 can be prepared in a process whose overall change is H2(g) + O2(g) -H02(1 Calculate the enthalpy change using the following data: H2O2(1) - H20(1) +502 (8); AH = -98.0 kJ (1) 2H2(g) + O2(g) → 2H20(1): AH = -571.6 kJ (2) 5. What is the wavelength, in nanometer, of light emitted when the electron in a hydrogen atom undergoes a transition...
When one mole of gaseous hydrogen peroxide, H2O2, is made from hydrogen and oxygen gases, the enthalpy change is –136 kJ. Which of the following correctly represents the thermochemical equation? i. H2(g) + O2(g) → H2O2(g) + 136 kJ ii. H2(g) + O2(g) + 136 kJ → H2O2(g) iii. H2(g) + O2(g) → H2O2(g) ΔH = –136 kJ iv. H2(g) + O2(g) → H2O2(g) ΔH = +136 kJ A.i only B.ii only C.iii only D.i and iii E.ii and iv
72. Hydrogen peroxide is a very common oxidizing agent. It has been used as an oxidizer for rocket engines, it is a readily available antiseptic for home use and we have used it several times in the general chemistry lab. Below is some thermodynamic data for hydrogen peroxide xide at 25 C H (kJ/mol AG (k.J/mol Chemical Thermodvnamics of hydrogen 188 266 H20:1) H2(g) 02(g) H:0:(1) 20H(g H2O2(g) → 20H(g) H202(g) HO:(g) +H(g) H2O2(l) H2O(l)+%O2(g) 120 188 174 332 365...
please explain with details sen peroxide is a colorless liquid at room temperature. It is soluble in water because of its unique structure. Figure 1 shows the structure, bond angles, and bond lengths in the molecule. Hydrogen pigure 1 shows Figure 1: Structure of hydrogen peroxide OLS 147.4 pm 1 0 9 95.0 pm .0pm OH 94.8 When heated hydrogen peroxide forms H20 and 02. The reaction is rapid in the presence of a catalyst like potassium iodide. Figure 2:...
Delete CHE 120 Pb.9.Liquid hydrogen peroxide, an oxidizing agent used in many rocket fuel mixtures, releases oxygen gas on decomposition: AHon=-196.1 kJ -2H2O(I)O2(g) 2H2O2(l) What mass of H2O2 decomposes if 2510 kJ is released?
Over time, hydrogen peroxide, H2O2, degrades into water and oxygen gas. A bottle of hydrogen peroxide is expired and you need to determine the concentration. A titration is performed using the following equation: 3 H2O2(aq) + 2 NaMnO4(aq) → 3 O2(g) + 2 MnO2(aq) + 2 NaOH(aq) + 2 H2O(l) Note that permanganate ion, MnO4-, is purple, while manganese (IV) ion, Mn4+, is colorless. A quantity of 683 mL of 3.44 M NaMnO4 was measured and placed in a beaker. The solution...
Compounds with carbon-carbon double bonds, such as ethylene, C2H4, add hydrogen in a reaction called hydrogenation C,H (9) + H2(g) + C H (9) Calculate the enthalpy change for this reaction, using the following combustion data: C4H4 () + 30 (g) + 2CO3(g) + 2H2O(); AH = -1411 kJ C, H(g) + O2(g) → 2002(g) + 3H2O(l); AH = -1560. kJ H2(g) + O2(g) H2O(l); AH = -286 kJ Enthalpy change - KJ Submit Answer Try Another Version 10 item...
The heat change for the decomposition of 26.9 g of hydrogen peroxide (H2O2) is -145.31 kJ. What is the enthalpy of reaction (in kJ) for the process with respect to moles of hydrogen peroxide? Report your answer to 3 significant figures. Hint: Check the sign of your answer.
Be sure to answer all parts. Liquid hydrogen peroxide, an oxidizing agent in many rocket fuel mixtures, releases oxygen gas on decomposition: 2 H2O2(1)→ 2H2O(1) + O2(g) AH r = -196.1 kJ Calculate the heat for the decomposition of 587 kg of H2O2. x 10 kJ (Enter your answer in scientific notation.)
Show that hydrogen peroxide (H2O2) is a liquid at 25°C by using the data below. ΔHf° (kJ mol-1) data: H2O2(l) = –187.8; H2O2(g) = –136.3 So (J mol-1 K-1) data: H2O2(l) = 110; H2O2(g) = 233