An open container holds 0.550 kg of ice at -15.0°C. The mass of the container can be ignored. Heat is supplied to the container at the constant rate of 800.0 J/min for 500.0 min After how many minutes does the ice start to melt? Express your answer in minutes. 17 ΑΣΦ t = Submit Part B Request Answer ? min After how many minutes, from the time when the heating is first started, does the temperature begin to rise above 0.0°C?
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- The specific heat of liquid water is 4190 J/kg. K. ▼ Part A What is the molar specific heat of liquid water in J/mol. K? Give your answer as a multiple of R, rounded to the nearest half integer. Express your answer as a multiple of R to the nearest half integer. Cmol = 9 R Submit Correct Part B Previous Answers Equal moles of liquid water and helium gas are heated at constant pressure from the same initial temperature to the same final temperature. By what factor is the entropy increase of the water larger than the entropy increase of the helium? Express your answer to two significant figures. AS water ASHe Submit 17| ΑΣΦ Request Answer ?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. Two kilograms of water at 120°C with a quality of 25% has its temperature raised 20°C in a constant-volume process as in the figure. What is the heat transfer and work in the process? MH_v1
- Heating substances in the sun: The following table shows the temperature after 10.0 grams of four different substances have been in direct sunlight for up to 60 minutes. Time (minutes) O (initial) 15.0 min 30.0 min 45.0 min 60.0 min Temperature (°C) 70 60 50 40 PART I: Experiment 1. Create a line graph for each substance on graph below. (You can use Excel or similar program) Label the substances. Temperature vs Heating Time 30 20 0 Air (°C) 25°C 28.9°C 32.5°C 36.2°C 40°C 10 Water (°C) 25°C 26.2°C 27.5°C 28.8°C 30°C 20 Time (minutes) 30 40 Sand (C) 25°C 30°C 50 35°C 40°C 45°C 60 Metal (°C) 25°C 35°C 45°C 55°C 65°C23.0 g of copper pellets are removed from a 300 degree C oven and immediately dropped into 100 ml of water at 25 degree C in an insulated cup . what will the new water temperature be? express answer in degree CWhen 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 Answer
- 1 please need help, keep in mind the 7 basic units and watch the sig figs. Please write in standard form need to see all the numbers in solution thank you so muchOne 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 40-cm-long icicle hangs from the eave of a house on a day when the temperature is -2.0°C. T Part A By how many millimeters does the icicle shrink if a bitterly cold wind drops the temperature to -20 °C? Express your answer with the appropriate units. AL= Submit xa μA Value 77 X.10n Units Previous Answers Request Answer ?
- ⦁ When a certain quantity of helium gas contained inside and engine cylinder combusts, the expanding gas causes the 12-cm-radius piston to move outward by 10.0 cm. If the gas remains at a pressure of 120 kPa for this process, what is the heat transfer? (See the diagram at the top of the next page.)⦁ 1,960 J⦁ 1,660 J⦁ 1,360 J⦁ 1,060 J⦁ 760 JA 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 °CThe 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)