1. Imagine you have 1 kg each of iron, glass, and water, and all three samples are at 10°C. The specific heat capacities of each are as follows: Ciron = 448J/kg. °C Cglass=837J/kg.°C Cwater = 4186J/kg. °C (b) Rank the samples from greatest to least amount of energy transferred by heat if each sample increases in temperature by 20°C. Support you answers with appropriate calculations/explanations where required.
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- 17. A 1 kg cube of lead is heated from 12.5 °C to 65.4 °C. How much energy is required to heat the lead ? (assume: specific heat for lead is 0.129 J/ gºC) SINDI 18. A block of mass 12 kg is pushed along a smooth frictionless surface with a two constant forces, F₁ = 100 N at the angle of 100 above the horizontal, and the F₂ = 50 N at the angle of 200 above the horizontal. The block is displaced 2.6 m. Calculate the total work done by block.3. In an experiment to determine the thermal conductivity of a bar of a new alloy, one end is maintained at 0C and the other at 100C. The bar has a cross-sectional area of 1cm? and a length of 20cm. If the rate of heat conduction through the bar is 34 Watts, what is the thermal conductivity of the bar? उ 券4. 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
- Temperature & Heat 13. At 30 °C the volume of an aluminum sphere is 30 cm³. The coefficient of linear expansion is 24 x 10 C¹. If the final volume is 30.5 cm³, what is the final temperature of the aluminum sphere? Assume B = 3 a 14. A 500-gram cube of lead is heated from 25 °C to 75 °C. How much energy was required to heat the lead? The specific heat of lead is 0.129 J/g-°C. 15. How much heat is required to convert 135 g of ice at -15 °C into water vapor at 120 °C? (Assume c of steam = 1.996 J/g-°C, c of water = 4.1858 J/g-°C, c of ice =2.090 J/g-°C. Lv of water = 540 cal/g & Lf of water = 80 cal/g)I need typing clear urjentWhat is the approximate amount of heat energy released when a 5.0 kg sample of the glass cools from 75ᵒC to 35ᵒC? (c=840 J/kg⋅ᵒC for glass) the answer is... a. 170 000 J b. 130 000 J c. -170 000 J d. -130 000 J e. 190 000 J
- A graph of temperature versus time for a substance that has a mass of 2.00 kg is shown below. The sample is at a temperature of-10.0 degrees celsius and initially in the solid phase. Heat is added to the sample at a constant rate of 20.0 kj/minute. B& Care at a temperature of 119 degree Celsius. Answer the following questions: 1. What is the melting point of this substance? 2. What islare the phase/phases that exists/exist during the process from A to B and during the process from B to C? 3. Use the graph to calculate the specific heat for this substance in solid phase. 4.Use the graph to calculate the latent heat of fusion for this substance. Temperdture cc) B 120 + 100 80 60 40+ 20 + 12 4 6. 10 %3D 13 -20 Time (min) %3D F009. A glass rod is 0.50 m long and has a mass of 0.50 kg. When the rod is heated, its length is increased by 2.0 x 104 m. Calculate the amount of energy that is added to the rod as heat. Note: Cglass=840 J/(kg °C) and glass = 9.0 x 10-6 °C -¹.3. 120 grams of water are heated from zero degrees Celsius to 30.0 degrees Celsius. Which expression should be used to determine the amount of calories added to the water to do this? The latent heat of fusion of ice is 79.7 cal/gram, and the specific heat of water is 1 cal/gramCo. a. 120 b. 120 x 1 x 30 c. 120 x 79.7 d. 30 divided by 120 e. 120 divided by 30