Consider the following hypothetical data for these pair of generic chemical reactions: A+B 2 AB AH = -200 kJ/mol B+C2 BC AH =-100 kJ/mol %3D Heat of Reaction Review Use the above information to determine the standard heat of reaction AH for this process: AB +C=BC + A. Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a -100 kJ -300 kJ +300 kJ +100 kJ

Consider the following hypothetical data for these pair of generic chemical reactions: A+B 2 AB AH = -200 kJ/mol B+C2 BC AH =-100 kJ/mol %3D Heat of Reaction Review Use the above information to determine the standard heat of reaction AH for this process: AB +C=BC + A. Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a -100 kJ -300 kJ +300 kJ +100 kJ

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question 14 of 15 Submit How many moles of KCIO. solid must be reacted according to the following balanced chemical reaction to transfer -34.2 kJ of heat? 2 KCIO:(s) → KCI(s) + 3 Ο(g) ΔΗ --89.4 kJ STARTING AMOUNT ADD FACTOR ANSWER RESET *( ) 2 0.383 1 6.022 x 1023 3060 122.55 74.55 -89.4 1000 -34.2 32.00 0.765 1530 0.001 mol KCI g O2 kJ g KCI mol KCIOS mol O2 g KCIO, J
Mass of empty beaker = 50.45 g Mass of water = 30.81 g Mass of beaker and water = 81.26 g Initial water temperature = 25.5 C Mass of metal = 54.02 g Initial metal temperature = 102.5 C Final water and metal mixture temperature = 36.0 C NOTE: The specific heat capacity of water is 4184 J/kg˚C. Using the relationship Emetal + Ewater = 0, determine the specific heat capacity of the unknown metal sample. Use proper sample calculation formatting Using the table of specific heat capacities handout, determine the most likely identity of the unknown metal sample. The biggest source of error in this investigation occurred when transferring the hot metal sample to the room temperature water. When the block was removed from the boiling water, it was held in the air for a few seconds as water dripped from its surface. This caused heat to move from the metal block to the air, before it was placed in the small beaker of water. How would this particular source of error…
lets assume the density of the water is d=500
Answer 7 and 8
A calorimeter holds 50 g water at 22.0°C. A sample of hot iron is added to the water. The final temperature of the water and iron is 28.0°C. What is the change in enthalpy associated with the change in the water's temperature? J Note: The specific heat of water is 4.18 g°C . Use the formula AH = - cmAT Show your work.
Consider these reactions: AH = -184.6 kJ Reaction 1: H₂(g) + Cl₂ (g) → 2HCl(g) Reaction 2:20F2 (g) O2(g) +2 F2 (g) AH = -49.4 kJ Reaction 3: N₂(g) + 2O2(g) → 2NO2(g) AH = +66.4 kJ Use Reaction 1. Determine the mass, in grams, of chlorine gas consumed (with excess H₂) when 1,891.0 kJ of energy is released from the system. Answer: g (mass must be positive; round to nearest whole number)
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Chemical handwarmers work by using the oxidation of iron to release heat (Q). In this reaction, the sign for the enthalpy change is __________ (+ or -) and the reaction is said to be __________(exothermic/endothermic). When ammonium nitrate dissolves in water, heat (Q) is absorbed. During this process, the sign for the enthalpy change is __________ (+ or -) and the reaction is said to be __________(exothermic/endothermic).
CHEMISTRY (Please write the complete solution legibly. Choose the correct answer. No long explanation needed. Answer in 2 decimal places. Box the final answer.) A 2.85 g sample of a food substance was burned in a calorimeter that had a heat capacity of 9.84kJ/°C. The temperature of the calorimeter increased from 22.51°C to 35.66°C. Calculate the amountof heat released per gram of the substance.a) 56.17 kJ/g b) 49.98 kJ/g c) 45.40 kJ/g d) 28.44 kJ/g
Calculate the energy of combustion per gram of Olive Oil (kJ/g) if 31.0 mL of water is placed in the test tube and the temperature changes from 22.9 °C to 44.6 °C. The initial mass of the spirit burner is 204.60 g and the final mass is 204.51g. State your answer with correct significant digits. Notes: • Include a negative sign if the reaction is exothermic • Do not include units in your answer.
I just need questions d, e, f. Thank you.
In the laboratory a "coffee cup" calorimeter, or constant pressure calorimeter, is frequently used to determine the specific heat of a solid, or to measure the energy of a solution phase reaction. Thermometer Stirring rod A student heats 66.89 grams of platinum to 99.25 °C and then drops it into a cup containing 83.90 grams of water at 22.41 °C. She measures the final temperature to be 24.37.°C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.72 J/°C. Water Assuming that no heat is lost to the surroundings calculate the specific heat of platinum. Metal sample Specific Heat (Pt) =| J/g °C. 02003 Thomeo-BrockaCoe