The graph below shows the change of phase of ice (-20 °C) to steam when heat is added. Temperature 100 °C 1 B: 2 O °C Heat (cal) -20 °C Thich point on the graph shows steam at 100°C? ect one: a. С b. Е с. D
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A: Temperature versus time is given for a substance.
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- Water at 34.0 °C is sprayed onto 0.154 kg of molten gold at 1063 °C (its melting point). The water boils away, forming steam at 100.0 °C and leaving solid gold at 1063 °C. What is the minimum mass of water that must be used? No handwriting plzHow much energy is required to raise the temperature of 0.2 kg of water from 120.°C to 80.°C? Answer in J. (What equation/ method should I use to solve this? Must I also convert the temperature to Kelvin if I'm not mistaken?)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 urjentHow much energy is required to raise the temperature of 0.25 kg of water from 20.°C to 80.°C? Answer in J. (What must i do to solve this?)What 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 F00A(n) 65-g ice cube at 0°C is placed in 680 g of water at 28°C. What is the final temperature of the mixture? 27.31 X Your response differs from the correct answer by more than 10%. Double check your calculations. °C275 g of cold water at 5.00 °C is mixed with 125 g of hot water at 80.0 °C. Assuming no energy is lost, what is the final temperature of the mixture? 21.6°C O 37.5 °C Ⓒ 28.4 °C 56.6 °C QUESTION 13 75 g of metal at 100 °C is mixed with 250 g of water at 20 °C and reaches an equilibrium temperature of 25 °C. What was the specific heat of the metal? 0.049 cal/g °C 9.8x10-3 cal/g °C 1.5 cal/g °C 0.22 cal/g °c