Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
12th Edition
ISBN: 9781259587399
Author: Eugene Hecht
Publisher: McGraw-Hill Education
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Chapter 18, Problem 23SP
To determine
The heat that must be added to melt the
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A 1 kg block of copper at 20 °C is dropped into a large vessel of liquid nitrogen at 77 K. How many kilograms of nitrogen boil away by the time the copper reaches 77 K? [ C cu = 387JKg-1°C-1, heat of vaporization of nitrogen is 2 ×105 J/Kg ]
A 3g copper coin at 20°C is dropped from a height of 300m and strikes the ground. If 60℅ of the energy goes into increasing the internal energy of the coin, determine its final temperature. [Ccu = 387Jkg-1°C-1 ]
please help with this problem:
1- How much heat must be added to 2.55 kg of copper to change it from a solid at 1358 K to a liquid at 1358 K? The latent heat of fusion for copper is 20.7 × 10^4 J/kg and the latent heat of vaporization of cooper is 47.3 × 10^5 j/kg.
Chapter 18 Solutions
Schaum's Outline of College Physics, Twelfth Edition (Schaum's Outlines)
Ch. 18 - 18.19 [I] Victoria Falls on the Zambezi River is...Ch. 18 - Prob. 20SPCh. 18 - 21. How much energy must be removed from a 10.0-kg...Ch. 18 - 22. A 100-kg chunk of ice at −150 °C is to have...Ch. 18 - Prob. 23SPCh. 18 - 24. A molten 50.0-kg quantity of gold at 1063 °C...Ch. 18 - Prob. 25SPCh. 18 - Prob. 26SPCh. 18 - Prob. 27SPCh. 18 - 18.28 [II] What will be the final temperature if...
Ch. 18 - Prob. 29SPCh. 18 - 18.30 [II] How long does it take a 2.50-W heater...Ch. 18 - 18.31 [II] A 55-g copper calorimeter contains 250...Ch. 18 - Prob. 32SPCh. 18 - 18.33 [II] How much heat is required to change 10...Ch. 18 - 18.34 [II] Ten kilograms of steam at 100 °C is...Ch. 18 - 18.35 [II] The heat of combustion of ethane gas is...Ch. 18 - Prob. 36SPCh. 18 - 18.37 [II] Determine the result when 100 g of...Ch. 18 - 18.38 [II] Determine the result when 10 g of steam...Ch. 18 - Prob. 39SPCh. 18 - 18.40 [II] How long will it take a 500-W heater to...Ch. 18 - Prob. 41SPCh. 18 - 18.42 [II] On a certain day the temperature is 20...Ch. 18 - 18.43 [II] How much water vapor exists in a 105-...Ch. 18 - 18.44 [II] Air at 30 °C and 90 percent relative...
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- How much energy is required to completely melt 5.00 kg of gold which is initially at room temperature (20° C)? [Gold is often stored in 5.00 kg bars.Some physical properties of gold:specific heat capacity of solid gold -- 129 J/kg°Cfreezing/melting point -- 1063° Clatent heat of melting -- 6.44 x 104 J/kg]arrow_forward[3 kW] 13. A copper rod and an aluminum rod of equal diameter are joined end to end in good thermal contact. The temperature of the free end of the copper rod is held constant at 100°C and that of the far end of the aluminum rod is held at 0°C. If the copper rod is 0.15 m long what must be the length of the aluminum rod so that the temperature at the junction is 50°C? [9 cm] diua 2 00 heatedarrow_forwardThe latent heat of vaporization of H2O at body temperature (37.0 °C) is 2.44E+6 J/kg. To cool the body of a 71.7 kg jogger [average specific heat capacity = 3480 J/(kg·°C)] by 1.90 °C, how many kilograms of water in the form of sweat have to be evaporated?arrow_forward
- A slab of stone of area 0.36 m² and thickness 0.1 is exposed on the lower surface to steam at 100°C. A block of ice at 0°C rests on the upper surface of the slab. In one hour 4.8 kg of ice is melted. The thermal conductivity of slab is- (Given latent heat of fusion of ice = 3.36 × 10° J kg-') (1) 1.29 J/m/s°C (2) 2.05 J/m/s"C (3) 1.02 J/m/s/"C (4) 1.24 J/m/s/"Carrow_forwardA 2 kg lead brick initially at 300°C, is dropped into a 1.5 kg insulated copper calorimeter that contains 1 kg of water. The initial temperature of the water and calorimeter is 20°C. If the final temperature at equilibrium is 31.8°C, compute the specific heat capacity of lead. [Given cwater = 4186 J/kg°C and ccopper = 389 J/kg°C] 2.arrow_forwardA 3 g copper coin at 20°C is dropped from a height of 300 m and strikes the ground. If 60% of the energy goes into increasing the internal energy of the coin, determine its final temperature. [ Ccu = 387 J/kg/°C]arrow_forward
- The latent heat of vaporization of H2O at body temperature (37°C) is 2.42 x 106 J/kg. To cool the body of a 78.3-kg jogger [average specific heat capacity = 3500 J/(kg C°)] by 1.94 C°, how many kilograms of water in the form of sweat have to be evaporated?arrow_forward104 g of water at 30°C is taken in a calorimeter made of copper of mass 42 g. When a certain mass of ice at 0°C is added to it, the final steady temperature of the mixture after the ice has melted, was found to be 10°C. Find the mass of ice added.[Specific heat capacity of water = 4.2 J g-1 °C-1 : Specific latent heat of fusion of ice – 336 J g-1 ; Specific heat capacity of copper = 0.4 J g-1 °C-1arrow_forwardHow much energy is required to increase the temperature of 0.02 kg water by 1°C? [specific heat of water, cw = 1.00 cal/g°C] *arrow_forward
- A 50 g ice cube at 0°C is heated until 45 g has become water at 100°C and 5 g has become steam at 100°C. Determine the amount of heat that can be added to accomplish this? [ Cwater=4186Jkg-1K-1, Lv=2.26×106Jkg-1, Lf=3.33×105Jkg-1arrow_forwardA piece of copper of a mass 0.10kg, initially at 97.4°C, is dropped into 0.20 kg of water contained in a 0.28-kg aluminium can; the water and aluminium are initially at 15°C. What is the final temperature of the system? [Specific heat of water Cw-4190 J/kg°C; Specific heat of copper Car 385 J/kg°C: Specific heat of aluminium CA 900 J/kg°C] [Choose the closest answer] O a. None of the answer is correct O b. 32.19 Celsius O c. 15.00 Celsius O d. 11.17 Celsius O e. 17.81 Celsius What is the outside temperature if 4000 kcal of heat is lost through a 4.0 m² pane of 0.30 cm thick glass (k = 2.0x104 kcal/s m °C) in one hour from a house kept at 38°C? [hint: use the constant value provided]arrow_forwardQuestion 4If a copper kettle has a base of thickness 2 mm and area 3 x 10^-2 m², estimate the steady difference in temperature between inner and outer surfaces of the base which must be maintained to enable enough heat to pass through so that the temperature of 1 kg of water rises at the rate of 0.25 K s^-1. Assume that there are no heat losses, the thermal conductivity of copper = 380 Wm^-1K^-1. and the specific heat capacity of water is 4200 Jkg^-1 K^-1.arrow_forward
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