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If a student performs an endothermic reaction in a calorimeter, how does the calculated value of delta H differ from the actual value if the heat exchanged with the calorimeter is not taken into account?
Delta H(calc)would be more negative because the calorimeter always absorbs heat from the reaction
Delta H(calc)would be less negative because the calorimeter would absorb heat from the reaction.
Delta H(calc) would be more positive because the reaction absorbs heat from the calorimeter
Delta H(calc)would be less positive because the reaction absorbs heat from the calorimeter
Delta H(calc)would equal the actual value because the calorimeter does not absorb heat
The infrared spectrum of the xanthene reduction product contains evidence that demonstrates that conjugation of the rings is still maintained
Compute the standard enthalpy of formation of gaseous diborane (B2H6) using the following thermo chemical information: 4B (s) + 3O2 (g) ==> 2B2O3 (s) change in H= -2509.1 kJ
A 0.160-mole quantity of NiCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Ni2 ions at equilibrium? Assume the formation constant* of Ni(NH3)62 is 5.5 × 108.
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Make a prediction on the solubility of benzoic acid and 9-fluorinone in the two solvents used in this experiment. (The two solvents were NaOH and 6 M HCl)
Calculate the pH when 59.0 mL of 0.229 M hydrochloric acid is mixed with 59.0 mL of 0.229 M sodium hydroxide solution at 25 °C. Calculate the pH when 59.0 mL of 0.229 M of a certain monoprotic weak acid
explain why water is not plotted on the delta t versus molecular mass graph in the analysis .(hint:what makes water different from the other 3 solvents?
This exothermic reaction is catalyzed by MnO2(s). 2H2O2(aq) => 2 H2O(l) + O2(g) Which of the following will increase the rate of this reaction? 1. Raising the temperature 2. Increasing the surface area of MnO2(s)
For the following battery: Cd(s) | CdCl2(aq) || Cl-(aq) | Cl2(l) | C(s) Write the reduction half-reaction occuring at the C(s) electrode. (Include physical states of reactants and products.) From which electrode will electrons flow from the batter..
A 2.0 L-reaction flask initially contains 0.17 mol CO, 0.15 mol H2, and 0.10 mol CH3OH (methanol). If this mixture is brought in contact with a zinc oxide-chromium(III) oxide catalyst, the equilibrium shown below is attained.
Calculate the percent error in your Hess's Law enthalpy value (-686 kJ/mol). The accepted textbook value is -601.7kJ/mol.
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