2.Use the data from Trial #2 to calculate the specific heat of the unknown metal object (cobj), in units of J ̊C−1 kg−1. Show your calculation and record the result below. 3. Use the data from Trial #1 to calculate the specific heat of the unknown metal object (cobj), in units of J ̊C−1 kg−1. Show your calculation and record the result below.
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2.Use the data from Trial #2 to calculate the specific heat of the unknown metal object (cobj), in units of J ̊C−1 kg−1. Show your calculation and record the result below.
3. Use the data from Trial #1 to calculate the specific heat of the unknown metal object (cobj), in units of J ̊C−1 kg−1. Show your calculation and record the result below.
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- To what temperature will 9400 J of heat raise 2.5 kg of water that is initially at 11.0 °C? The specific heat of water is 4186 J/kg · C°. Express your answer using three significant figures. ? T = C° Submit Request Answer4. When you boil water in a pot on the stove, which heats faster, the metal or the water? Explain. 5. Why do you think different substances heat up and cool down at different rates? 6. Based on the definition above, which of the 4 substances do you think has: a) the highest specific heat capacity? b) the lowest heat capacity? 7. Here are the heat capacities of the four substances: 4.18 J/g °c, 1.00 J/g °c, 0.80 J/g °c, and 0.60 J/g °c. Match and then label each substance with its specific heat capacity on the graph.provide the correct significance figure?
- When a 270-g piece of iron at 160 °C is placed in a 95-g aluminum calorimeter cup containing 250 g of liquid at 10° C, the final temperature is observed to be 35 °C. The value of specific heat for iron is 450 J/kg·C°, and for aluminum is 900 J/kg · C°. Part A Determine the specific heat of the liquid. Express your answer using two significant figures. VO AE ? J C = kg-C° Submit Request AnswerOne end of a 70-cm-long copper rod with a diameter of 2.0 cm is kept at 420 °C, and the other is immersed in water at 24 °C. Part A Calculate the heat conduction rate along the rod. Express your answer to two significant figures and include the appropriate units. t μA = Value Submit Units and Previous Answers Request Answer ?A 850 g aluminum pan is removed from the stove and plunged into a sink filled with 11.0 L of water at 20.0 °C. The water temperature quickly rises to 24.0 °C. Part A What was the initial temperature of the pan in °C? Express your answer with the appropriate units. Tinitial Submit Part B 11 Tinitial VO V—| ΑΣΦ Request Answer What was the initial temperature of the pan in °F? Express your answer with the appropriate units. VE ΑΣΦ C Ć SALA CO — ? ? °F °C
- The basal metabolic rate is the rate at which energy is produced in the body when a person is at rest. A 68 kg (150 lb) person of height 1.83 m (6.0 ft) would have a body surface area of approximately 1.9 m². Part A What is the net amount of heat this person could radiate per second into a room at 19.0° C (about 66.2°F) if his skin's surface temperature is 31.0° C? (At such temperatures, nearly all the heat is infrared radiation, for which the body's emissivity is 1.0, regardless of the amount of pigment.) Express your answer in watts. ΑΣφ ? Hnet W %D Submit Request Answer Part B Complete previous part(s)ConstanS T Pent Part A An experiment measures the temperature of a 400 g substance while steadily supplying heat to it. The figure shows the results of the experiment. (Figure 1) What is the specific heat of the solid phase? Express your answer to two significant figures and include the appropriate units. ? Value Units C = Submit Request Answer Part B What is the specific heat of the liquid phase? Express your answer to two significant figures and include the appropriate units. ? Value Units C = Submit Request Answer Part C Figure What is the melting temperature? Express your answer to two significant figures and include the appropriate units. T(°C) 80 ? 60 40 T, - Value Units 20 Q (kJ) 40 80 120 160 200 -20 Submit Request Answer -40Question 1 Read the question and type your response in the box provided. Your response will be saved automatically. Temperature (°C) A' B CA co B' Heat Added (Joules) D' ********* E' OE D www. Substance Y · Substance X 140 BE The graph depicts the temperature curves for two substances labeled as substance X and Y. Why does the temperature remain constant as heat is added to each substance in the regions labeled A to B, C to D, and A' to B', and C' to D'? Based on the curve for either substance X or substance Y and using what you know about the particulate nature of matter, and the relationship between temperature and potential or kinetic energy, describe why adding heat leads to the step-wise change in temperature depicted in the graphs. We're starting the add-ins runtime, just a moment... R X 80%