For which of the following
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Chemistry: Atoms First
- Sodium reacts violently with water according to the equation Na(s) + H2O() NaOH(aq) + H2(g) Without doing calculations, predict the signs of rH and rS for the reaction. Verify your prediction with a calculation.arrow_forwardWrite the balanced chemical equation for the combustion of methane, CH4(g), to give carbon dioxide and water vapor. Explain why it is difficult to predict whether S is positive or negative for this chemical reaction.arrow_forwardGiven the following information at 25C, calculate G at 25C for the reaction 2A(g)+B(g)3C(g) Substance Hf(kJ/mol) S(J/molK) A(g) 191 244 B(g) 70.8 300 C(g) 197 164 a 956 kJ b 956 kJ c 346 kJ d 346 kJ e 1.03 103 kJarrow_forward
- Indicate whether the following processes are spontaneous or nonspontaneous. (a) Liquid water freezing at a temperature below its freezing point (b) Liquid water freezing at a temperature above its freezing point (c) The combustion of gasoline (d) A ball thrown into the air (e) A raindrop falling to the ground (f) Iron rusting in a moist atmospherearrow_forward2. Which of the following is true for a spontaneous process but not for a nonspontaneous process? Energy in the universe is concentrated conserved dispersed not conservedarrow_forwardDefine the following: a. spontaneous process b. entropy c. positional probability d. system e. surroundings f. universearrow_forward
- Write the balanced chemical equation for the combustion of benzene, C6H6(l), to give carbon dioxide and water vapor. Would you expect S to be positive or negative in this process?arrow_forwardArrange the following reactions in order of increasing ΔrxnS and briefly explain your reasoning.a) S(s) + O2(g) ⟶ SO2(g)b) H2(g) + O2(g) ⟶ H2O2(ℓ)c) CO(g) + 3 H2(g) ⟶ CH4(g) + H2O(ℓ)d) C(s) + H2O(g) ⟶ CO(g) + H2(g)arrow_forwardIndicate the sign (positive or negative) of ΔGo at low and high temperatures for each of the following processes: a) NH3(g) + HCl(g) → NH4Cl(s) b) CaCO3(s) → CaO(s) + CO2(g) c) CH3OH(l) → CH3OH(g) ΔHo < 0 Determine what it would be at Low and high b)CaCO3(s)-->CaO(s)+ CO2(g) Ho > 0 Determine what it would be at low and high c)CH3OH(I)-->CH3OH(g) ΔHo > 0 Determine what it would be at low and high d) 2Cl2(g) + 7O2(g) → 2Cl2O7(l) ΔHo > 0 Determine what it would be at low and higharrow_forward
- Arrange the following reactions in order of increasing ΔrxnS and briefly explain your reasoning. a) S(s) + O2(g) ⟶ SO2(g)b) H2(g) + O2(g) ⟶ H2O2(ℓ)c) CO(g) + 3 H2(g) ⟶ CH4(g) + H2O(ℓ)d) C(s) + H2O(g) ⟶ CO(g) + H2(g)arrow_forwardWhat is the ΔS for H2O (l) + CaO (s) --> Ca(OH)2 (s) ?arrow_forwardΔS is positive for the reaction ________. A) 2H2 (g) + O2 (g) → 2H2O (g)B) 2NO2 (g) → N2O4 (g)C) CO2 (g) → CO2 (s)D) BaF2 (s) → Ba2+ (aq) + 2F- (aq)E) 2Hg (l) + O2 (g) → 2HgO (s)arrow_forward
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