onsider a cloudless day on which the sun shines down across the United States. If 2751 kJ of energy reaches a square meter m?) of the United States in one hour, how much total solar energy reaches the entire United States per hour? The entire area of the United States is 9,158,960 km2. solar energy per hour: kJ/h

onsider a cloudless day on which the sun shines down across the United States. If 2751 kJ of energy reaches a square meter m?) of the United States in one hour, how much total solar energy reaches the entire United States per hour? The entire area of the United States is 9,158,960 km2. solar energy per hour: kJ/h

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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You will find the final temperature when 5.00 grams of aluminum at 425℃ is placed in 50.0 grams of water at 19.5℃. Aluminum has a specific heat capacity of 0.900 J/g ℃. And water has a specific heat capacity of 4.184 J/g℃. Now set –q(hot) = q(cold) and solve for the final temperature (as done in class) and then give the calculator answer for the final temperature! (Give 7 digits). Select one: a. 8.755643 ℃ b. 26.35996 ℃ c. 12.39981 ℃ d. 28.64197 ℃ e. 29.70363 ℃ f. 10.58574 ℃ g. 30.47036 ℃ h. none of these i. 26.81358 ℃ j. 28.03884 ℃
1.42 (a) and (b)
One hour of bicycle racing can require 500-900 kcal of energy, depending on the speed of the race, the terrain, and the weight of the racer. Tour de France riders must consume abnormal amounts of food to supply this energy. Food in the form of protein or carbohydrates produces 17 kJ of energy per gram consumed. How many kilograms of protein or carbohydrate must be consumed to provide the energy for 175 minutes of racing that requires 650.0 kcal/hr.1 kcal = 4.184 kJ.
Part A If 52 J of heat is added to an aluminum can with a mass of 29.1 g , what is the temperature change? The specific heat capacity of aluminum is 0.903 J/g°C. Express your answer using two significant figures. ΑΣφ AT = °C
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Consider these reactions, where M represents a generic metal. 2 M(s) + 6HCl(aq) →→→ 2 MC1₂(aq) + 3H₂(g) HCI(g) HCl(aq) H₂(g) + Cl₂(g) → 2 HCI(g) MCI, (s) → MCI, (aq) Use the given information to determine the enthalpy of the reaction 2 M(s) + 3 Cl₂(g) → 2 MC1₂ (s) 1. 2. 3. 4. ΔΗ = AH₁ = -694.0 kJ AH₂ = -74.8 kJ AH3= -1845.0 kJ AH4 = -375.0 kJ kJ
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1 If a 69 kg person ate 165 calories worth of sugar (about the calories in a typical energy drink and they converted all of that energy to heat immediately, what would be the change in temperature of that person? A couple of useful facts for this problem. Food calories are actually kilocalories. 1.000 kilocalorie = 4184 Joule We will assume that the average specific heat of this person's body is 3.00 J/gºC. Enter your answer in ºC with at least 2 sig figs. Just so you are not afraid to eat or drink things, a healthy body is very good at regulating temperature- the bad news is that unless you use it right away, our bodies are very good at converting sugar into fat.