Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Use the heat equation to calculate the energy or calories lost when (8.8x10^1) g of water cools from 45 °C to 25 °C. Report answer to correct sig figs and in scientific notation.
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- Question 17 of 26 What is the heat needed to heat 150 g of water from 10.0°C to 100°C, (specific heat of water = 4186 J/kg-°C)? Select the correct response: 68.2 56.5 44.6 75.1 37.2 ㅋarrow_forwardthe laboratory a student finds that it takes 101 Joules to increase the temperature of 13.6 grams of solid iodine from 20.6 to 39.3 degrees Celsius. e specific heat of iodine calculated from her data is J/g°C.arrow_forwardLearning Goal: To understand the concepts of heat capacity, specific heat, and molar heat capacity. Heat capacity, C, is the amount of energy required to raise the temperature of a substance by exactly one degree Celsius. The energy needed to warm an object increases as the mass of that object increases. We see this in our everyday life. For example, we know that it takes much more energy to heat a large tank of water than a small cup. Because of this dependence on mass, experimentally determined heat capacities are always reported in terms of the amount of the substance that is heated. One method is to report how much energy it takes to raise the temperature of one mole of a substance by exactly one degree Celsius. This value is the molar heat capacity, which has the symbol Cp. The molar heat capacity is given in the units J mol- °C-1.A second method is to report how much energy it takes to raise the temperature of one gram of a substance by exactly one degree Celsius. This value is…arrow_forward
- I Review | Constants A metal is thought to be copper or gold. When 18 g of the metal absorbs 58 cal, its temperature rises by 35 °C. Use the table given below to compare the specific heat values of the given metals and solve the following questions. Part A Specific Heats for Some Substances What is the specific heat in cal/(g .° C) of the metal? cal/(g.° C) J/(g. C) Substance Express your answer in calories per gram per degree Celsius to two significant figures. Elements Aluminum, Al(s) 0.214 0.897 ? Copper, Cu(s) 0.0920 0.385 Gold, Au(s) 0.0308 0.129 cal/(g °C) Iron, Fe(s) 0.108 0.452 Silver, Ag(s) 0.0562 0.235 Submit Previous Answers Request Answer Titanium, Ti(s) 0.125 0.523 Compounds X Incorrect; Try Again Ammonia, NH3(s) 0.488 2.04 Ethanol, C2 H6O(s) 2.46 0,588 Sodium chloride, NaCl(s) 0.207 Part B Complete previous part(s) 0.864 Water, H20(1) 1.00 4.184 Water, H20(s) < Return to Assignment 0.485 2.03 Provide Feedbackarrow_forwardDetermine the heat in kJ to heat 7.18 moles of ice from -29.286 degrees celcius to -2.357 degrees celcius. the specific heat of ice is 2.03 J/g degrees celcius.arrow_forwardA chemical reaction takes place inside a flask submerged in a water bathThe water bath contains 2.80 kg of water at 21.5 degrees * C During the reaction 110. of heat flows out of the flask and into the bath Calculate the new temperature of the water bathYou can assume the specific heat capacity of water under these condition 4.18 3* g^ -1 K^ -1 Be sure your answer has the correct number of significant digits.arrow_forward
- Question 2 of 2 Submit How much heat will be absorbed by a 50.3 g piece of aluminum (specific heat = 0.930 J/g•°C) as it changes temperature from 23.0°C to 67.0°C? kJ 1 2 3 4 6. C 7 8 +/- х 100 Tap here or pull up for additional resources LOarrow_forward12. When freezing weather threatens the citrus crop in Florida, growers spray their orange trees with water, using their knowledge of enthalpy to protect the fruit. How much heat is released when 1000 g of liquid water at 10.0°C is completely converted to ice of a temperature of -2.0°C? A. 8.2 x 104 J B: 6.1 x 105 J C. 3.3 x 105 J D.) 3.8 x 10³ J E. 4.2 x 104 Jarrow_forwardThe temperature of 34.7 g H2O changes from 27 °C to 53 °C. What is the heat associated with this change? Is heat flowing into or out of the water? How do you know?arrow_forward
- In the laboratory a student finds that it takes 139 Joules to increase the temperature of 13.0 grams of solid silicon from 23.1 to 39.5 degrees Celsius.The specific heat of silicon calculated from her data is _______J/g°C.arrow_forwardCalorimetry questionarrow_forwardMetal Zn Ag Mass (g) 15 30 Specific heat (J/g·°C) 0.440 0.240 Temperature (°C) 20 80 When these two metals are placed in contact, which of the following will take place? Group of answer choices A.) No heat will flow in either direction. B.) Heat will flow from Ag to Zn because Ag has a larger mass. C.) Heat will flow from Zn to Ag because Zn has a larger heat capacity. D.) Heat will flow from Ag to Zn because Ag is at a higher temperature. E.) Heat will flow from Zn to Ag because Zn has a higher specific heat.arrow_forward
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