if we wanted to measure the energy released by an exothermic reaction (like combustion, acid/base neutralization, and oxidation) we would do it in a sealed container and monitor the increase in [1 word]
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- Given the following reactions or reaction conditions, determine which are spontaneous. Choose one or more: Select one or more answers and submit. For keyboard navigation... SHOW MORE ✓ a b с Multiple answers: Multiple answers are accepted for this question d AG°¹ = +12.0 kJ/mol AG⁰¹ > 0 Keq = 10000 AH 0 Your answerA rescarcher studying the nutritional value of a new candy places a 4.40 g sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.30 "C. If the heat capacity of the calorimeter is 45.00 kJ-K-, how many nutritional Calories are there per gram of the candy? Calories of candy: Cal/g per gram1. Bomb calorimeters are used to determine the heat of combustion of various samples like fuels. Benzoic acid (C6H5COOH) is typically used as a standard in calibrating bomb calorimeters . In a typical reaction 1.20 g of benzoic acid was burned in excess oxygen gas and releases 31.723 kJ of energy . The temperature of the water bath of the calorimeter is 24.6 degrees Celsius . A. Calculate heat B. Calculate change in internal energy C. Calculate work D. What is its change in enthalpy
- Identify the letter (A, B, C) that indicates the change in the energy of the entire reaction according to this energy profile. Explain why you choose the particular energy change. Include in your answer information about the ones you did not chose. alyzed Reaction Energy Exothermic Reaction ProfileDiagrams like the one below are used to represent exothermic reactions. For instance, consider burning charcoal (which almost entirely pure element carbon). A=carbon and B=oxygen, when they react they form C=carbon dioxide. A little chemistry vocab: does substance C in the diagram represent a reactant or the product? Activation Energy A+B Reaction Progression EnergyThis reaction is exergonic because the reactants have more potential energy than the products.
- endothermic reactions absorb energy from their surroundings. If chemicals for an endothermic reaction are added to water, the water's temperature drops (the water gets colder! Ever use a first aid "cold pack", where you squeeze a pouch to release chemicals inside and the pouch becomes ice cold? That's an endothermic reaction!) For endothermic reactions, when you use the equation Q = m x C x (delta T), the "Q" is a negative number because the water LOSES energy. The answer is negative because the water temperature drops, the CHANGE registered on the thermometer is negative. Type a negative number to answer this question: if your water starts at 19 degrees Celsius, and a couple of minutes after adding chemicals the water temperature becomes 15 degrees, the value of "delta T" is degrees Celsius. *When you eat starchy foods resulting in a breakdown to give glucose to the body, you have induced a(n): Group of answer choices ion combustion oxidation-reduction reaction oxygen combustion Ion-reduction reactionthis one represents an endothermic reaction. Things are similar: the flat line on the left (beginning of the reaction) is the total energy possessed by the reactant molecules; once again, kJ stands for energy in kiloJoules, thousands of Joules. The flat line on the right (reaction complete) is the total energy of the products. Since an endothermic reaction has a net absorption of energy (taking this extra energy from the surroundings), the products have higher energy than the reactants. Question: the energy of the reactant molecules is kJ. [to answer, simply identify the correct y-axis coordinate.] 250 200 PE (kJ) 150 100 50 Reaction pathway
- Draw the major product of the following reaction. Br (CH3)3N Ag₂O, H₂O heatAn aqueous solution containing 30mol% NaCl is used to produce NaOH by electrolysis. At the anode, the chloride ion is oxidized to chlorine gas; at the cathode, water is reduced to hydroxide and hydrogen gas. The chlorine gas and hydrogen gas exit the electrolysis system while the remaining solution is concentrated in an evaporator to produce a product containing 50mol% NaOH, 7mol% NaCl and 43mol% H2O. What is the percent conversion of salt to sodium chloride? How much chlorine gas (in kg) is produced per kg of product and How much water (in kg) must be evaporated in the evaporator per kg of product?Sodium chloride, the table salt (NaCl) is added in cooking to enhance the flavor of the food. When 10.0 g of NaCl are added in 200.0 mL of water at 25.0oC in a coffee-cup calorimeter, 669 J of heat are absorbed. (Assume that there is no change in volume, d=1.00 g/mL, specific heat=4.18 J/g.oC). Evaluate the truthfulness of this statement: "Based on the above description, the solution process (i.e., the dissolution of NaCl or the breakdown of NaCl into its constituent ions) is exothermic." True False