2. Why do some reactions that are not spontaneous at room temperature become spontaneous at higher...
Are all the exothermic reactions spontaneous? Are all the endothermic reactions non- spontaneous? Explain your reasoning using appropriate equations. 4.
All exothermic reactions are favorable. Using your own words, explain why some exothermic reactions are non-spontaneous even when they are all favorable. HTML Editor
4. Hot packs. All reactions are spontaneous; note that some are exothermic and some are endothermic. How can a spontaneous reaction Increase in energy? Hot packs, exothermic: CaClas) → Calag) + 2CH(aq) 4,H=-81.35 kd/mol. MgSO4(s) → Mg?"(aq) +507(ag) AH-91.22 kJ/mol Just plain hot-watch out! NaOH(s) → Na'(aq) + OH'(aq) AH = -44.50 kJ/mol. a. Pick one of the above reactions and calculate how much 1.0 g of the solid would increase the temperature of 100 mL of water. Let your...
Also, can you explain why it would either become more or less spontaneous please. 3. Balance the following redox reactions, adding H20 and H+ (or OH) as needed. Predict for each one whether the reaction would become more or less spontaneous at higher pH. Procedures for balancing redox reactions in acid or base can be found in Chapter 4.1 of our Wikibook (a) MnO4 (aq) + N2O(g) (6) Cr2O72- (aq) + S2032- (aq) c) H2O2 (aq) + HI (aq) —...
Its True or False 44. When this reaction is carried out at constant volume at room Tieu out at constant volume at room temperature with 1 mole of Din and sufficient oxygen, the reaction mixture gives off 1,516,000 joules of heat to its surroundings. 45. The entropy of a substance is greater as a liquid than as a solid. 46. The entropy of a substance is greater as a gas than as a liquid. 47. All reactions become more spontaneous...
1. Which of the following processes are spontaneous or non-spontaneous? a. 2 H2(g) + O2(g) → 2 H 0(2) b. Recharging a battery without plugging it in. C. Salt dissolving in water d. Freezing a popsicle at room temperature 2. For the following equilibrium constant values, indicate whether the process is spontaneous or nonspontaneous AND whether the value of ArxnGº is greater than less than or equal to zero by circling the appropriate response. Equilibrium Constant Value Is the reaction...
When some ionic solids (for example, potassium chloride) are dissolved in room temperature water, the beaker becomes cold. a) Based on this observation, is the enthalpy of dissolution positive, negative or zero? b) Since potassium chloride spontaneously dissolves in water at room temperature, does the entropy of the system increase or decrease as the solid dissolves? Briefly explain your answer. c) Based on your answers to parts a) and b), will potassium chloride become more soluble or less soluble as...
Show all work for full credit. RATATemperature: a95% aa't a78 = a95 K Room Temperature: Observations of liquid Unknowns: Unknown A Unknown B Unknown C Unknown D Unknown E T(K) Time(s) T (K) Time(s)T(K) Time(T (K) Time(s) T (K) Time(s) 82.4 nun. amin 1292. 31 mun30 92 mn nun anun 30sec 303 9 I Heat of Vapo and Intermolecular Forces: Post-Lab POST-LAB QUESTIONS Show all work for full credit. 1. Some of the temperatures dropped very quickly as the solution...
Why do you think obesity has become such an epidemic in the United States? Which of the local, national, or international initiatives stand the best chance of helping? Explain your reasoning.
XX X 2 Question 27: In your own words, explain why at room temperature ethano ethane (CH3CH3) is a gas? Draw their VSEPR structures for your explanation. (8 pts) lain why at room temperature ethanol (CH3CH2OH) is a liquid and