A 6-g sample of sugar is burned in a calorimeter. The temperature of 1 kg of water in the calorimeter rises from 20deg C to 44 deg C. Find the energy value of the sugar per gram.
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- The Specific Heat Capacity of Lithium is 3.56 J / g C. What is this Specific Heat Capacity using calories?314.0 kg copper bar is put into a smelter for melting. The initial temperature of the copper is 299.0 K. How much heat in kilojoules must the smelter produce to completely melt the copper bar? (The specific heat for copper is 386 J/kg•K, the heat of fusion for copper is 205 kJ/kg, and its melting point is 1357 K.)A family comes home from a long vacation with laundry to do and showers to take. The water heater has been turned off during the vacation. If the heater has a capacity of 50.0 gallons and a 4,500-W heating element, how much time is required to raise the temperature of the water from 20.0°C to 55.0°C? Assume the heater is well insulated and no water is withdrawn from the tank during that time
- An insulated Thermos contains 140 cm³ of hot coffee at 89.0°C. You put in a 14.0 g ice cube at its melting point to cool the coffee. By how many degrees has your coffee cooled once the ice has melted and equilibrium is reached? Treat the coffee as though it were pure water and neglect energy exchanges with the environment. The specific heat of water is 4186 J/kg.K. The latent heat of fusion is 333 kJ/kg. The density of water is 1.00 g/cm³. Number UnitsSuppose a walrus transfers energy by conduction through its blubber at the rate of 125 W when immersed in -1.25°C water. The walrus’s internal core temperature is 37.0°C, and it has a surface area of 1.85 m2. Chart attached. What is the average thickness of its blubber, in centimeters, which has the conductivity of fatty tissue?A block of 0.50 kg ice is at −30C°. How much heat will it need in order to reach a temperature of 140C°? The following table gives the properties and data of ice, water, and steam (a) 2.3 MJ (b) 1.5 MJ (c) 4.3 MJ (d) 5.5 MJ (e) 1.6 MJ
- The specific heat of a substance varies with temperature according to the function c = 0.20 + 0.14T + 0.023T, with T in degrees celsius and c in cal/g K. Find the energy required to raise the temperature of this substance from 5.0 degrees celsius to 15 degrees celsius.19. The following fission reaction (shown below) occurs in a nuclear power plant. There are 1.50 x 1016 uranium-235 atoms that are simultaneously undergoing this reaction. The uranium is surrounded by 17.5 kg of heavy water, which has a specific heat capacity of 4.70 x 10³ J/kg °C. If 90% of the energy released in the nuclear reactions is absorbed as thermal energy by the heavy water, determine the increase in temperature of he heavy water. ✔✔✔✔ 235U+n→ Zr + 139 Te + 3(n) 92 40 52 mzr-94 = 93.906 u MTe-139 = 138.935 u Mu-235 = 235.044 uThe intensity of solar radiation above the earth’s atmosphere is about 1300 W/m2. The earth’s average surface temperature is relatively constant over geological time spans, so the energy the earth receives from the sun must be balanced by energy the earth reradiates in all directions into space. If the earth were to have a uniform temperature over its entire surface, what would the temperature be?