The standard molar enthalpy of formation for carbon disulfide is 89.0 kJ/mol"
I got delta H = 178 kJ (is that right?). However, I'm having trouble knowing whether it's + or -.
HCl is a corrosive colourless gas that dissolves readily in water. Aqueous HCL reacts with NaOH to form water and NaCl. In a simple calorimeter, a 100.00 mL sample of 0.355 mol/L HCl(aq) is mixed with 50.00 mL of excess NaOH(aq). During the reaction, there
The addition of a catalyst in a chemical reaction (A) increases the concentration of products at equilibrium. (B) increases the fraction of reactant molecules with a given kinetic energy. (C) provides an alternate path with different activation energy. (D)
Which of the following has a standard enthalpy of formation value of zero at 25 degrees C and 1.0 atm A. Fe(s) B. Fe2O3(s) C. FeSO4(s) D. FeSO4(aq) E. FeS3(s) and what is enthalpy or how do you find it
If delta H°rxn and delta S°rxn are both positive values, what drives the spontaneous reaction and in what direction at standard conditions? The spontaneous reaction is a)enthalpy driven to the left. b)entropy driven to the right. c)entropy driven to the
Write a balanced chemical equation for the reaction that occurs when dimethylether, , is combusted in air. Express your answer as a balanced chemical equation. Identify all of the phases in your answer.
2.9 The standard enthalpy of formation of the metallocene bis(benzene)chromium was measured in a calorimeter. It was found for the reaction Cr(C6H6)2(s) → Cr(s) + 2 C6H6(g) that . Find the corresponding reaction enthalpy and estimate the standard
Magnesia (MgO(s)) is used for fire brick, crucibles and furnace linings because of its high melting point. It is produced by decomposing magnesite (MgCO3(s)) into at around 1200oC Write a balanced equation for the magensite decomposition being sure to
C2H2(g) + 2H2(g) --> C2H6(g) Information about the substances involved in the reaction represented above is summarized in the following table: C2H2(g) 226.7 kj/mol C2H6(g) -84.7 kj/mol [the values are the change in enthalpy] a. write the equation for the
A reaction is always non-spontaneous when a. ∆H>0, ∆S>0 b. ∆H>0, ∆S
If the following reaction: NO(g) + 1/2O2(g) NO2(g) has the following enthalpy change: H° = -56 kJ/mol What is the enthalpy of the decomposition reaction of 2 moles of NO2? A. 112 kJ B. 56 kJ C. -56 kJ D. -112 kJ i think the answer is d
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