What is the approximate amount of heat energy released when a 5.0 kg sample of the glass cools from 75°C to 35°C? (c=840 J/kg.ºC for glass) a. 170 000 J b. 130 000 J c. -170 000 J d. -130 000 J e. 190 000 J
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- 2900000 48 cal/g eat meat sheet of paper, solve the following problems. Note that quantity of heat energy required to change the phase of a substance is given by the following equation: Q = mL, where is the heat required, m is the mass, and L is the heat of fusion or vaporization. 1. How much energy is absorbed when 25.0 g of ice at 0.0°C melts to form water at 0.0°C? The heat of fusion of ice is 80 cal/g. 2. How much energy is absorbed when the water at 0.0°C in Question 1 is heated to 100.0°C? The specific heat of water is 1.0 cal/g °C. 3. How much energy is absorbed when the water at 100.0°C in Question 2 vaporizes to 100.0°C? The heat of vaporization of water is 540 cal/g. 4. The steam in Question 3 is used to melt ice. How much ice will be melted by the energy released by the condensation of the steam at 100.0°C?G67H78
- Question 37What 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 J5. A 0.400-kg of ice is initially at temperature of -12.0 °C. How much heat is required to melt two-third the mass of the ice only? J
- The initial temperature of 150 g of ice is -20°C. The spe-cific heat capacity of ice is 0.5 cal/g.C° and water's is1 cal/g•C°. The latent heat of fusion of water is 80 cal/g.a.How much heat is required to raisethe ice to 0°C andcompletely melt the ice?b. How much additional heat is required to heat the water(obtained by melting the ice) to 25°C?C.What is the total heat that must be added to convert the80 g of ice at-20°C to water at +25°C?d. Can we find this total heat simply by computing howmuch heat is required to melt the ice and adding theamount of heat required to raise the temperature of 80 gof water by 45°C? ExplainThe heat conducted through a bar depends on which of the following? A. The coefficient of linear expansionB. The thermal conductivityC. The specific heat capacityD. The length of the barE. The cross-sectional area of the bar A, C, and D A, B, and D B, C, D, and E B, D, and E C, D, and E3. 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