On a trip, you notice that a 3.50-kg bag of ice lasts an average of one day in your cooler. What is the average power in watts entering the ice if it starts at 0°C and completely melts to 0°C water in exactly one day 1 watt = 1 joule/second (1 W = 1 J/s)?
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A: Given : c = 2010 J/kg.°C m = 3.30 kg Ti = 110°C Tf = 132°C
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Q: An insulated Thermos contains 170 cm³ of hot coffee at 83.0°C. You put in a 16.0 g ice cube at its…
A: Specific heat of water= 4186 J/kg.K
Q: When you jog, most of the food energy you burn above your basal metabolic rate (BMR) ends up as…
A: Time , T = 39 min 1 cal = 4.186 J Q = 400 kcal /h for 30 min = 8.37 x 105 J To find = a) Amount of…
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A: Givenn=2.3 molesT=104∘ CVi=VVf=9Vformula usedwork done in isothermal process, w=nRTlnVfViAnd. from…
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A: The solution for this question has been given below..
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Q: Three moles of an ideal monatomic gas are at a temperature of 383 K. Then 2892 J of heat is added to…
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Q: An ice bag containing 0°C ice is much more effective in absorbing heat than one containing the same…
A: Q =mc(∆T) =(0.9)(4.186)(25-0) = 94.185 kJ = 94185 J
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Q: The rate at which a resting person converts food energy is called one’s basal metabolic rate (BMR).…
A: Given The heat of the evaporation of fat is Qe = 400 kcal/h = 400 x 1.163 W = 465.2 W. The energy by…
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- 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to raise the temperature of the water from 20.0°C to 55.0°C? Assume the heater is well insulated and no water is withdrawn from the tank during that timeAn uninsulated container holds 3.5 mol of an ideal gas at an initial temperature of 300 K. The gas is compressed by a movable piston, and 500 J of work is done on the gas while being compressed. If the final temperature of the gas is 400 K, how much heat flows in or out of the gas during this process?One gram of water is vaporized into 1.65×103 cm3 when boiled at a constant pressure of 1.013×105Pa. If the heat of vaporization at this pressure is Lv=2.256×106J/kg, what is the work done by the water when it vaporizes?
- The first law of thermodynamics relates the heat transfer into or out of a system to the change of internal and the work done on the system. How much heat, in joules, is transferred into a system when its internal energy decreases by 165 J while it was performing 27.5 J of work?Suppose 9.30 x 105 J of energy are transferred to 2.00 kg of ice at 0°C. (a) Calculate the energy required to melt all the ice into liquid water. (b) How much energy remains to raise the temperature of the liquid water? (c)Determine the final temperature of the liquid water in Celsius.When you jog, most of the food energy you burn above your basal metabolic rate (BMR) ends up as internal energy that would raise your body temperature if it were not eliminated. The evaporation of perspiration is the primary mechanism for eliminating this energy. Determine the amount of water you lose to evaporation when running for 58 minutes at a rate that uses 400 kcal/h above your BMR. (That amount is often considered to be the "maximum fat-burning" energy output. The latent heat of vaporization of water at room temperature is 2.5 106 J/kg.) A) _________ kgB)The metabolism of 1 gram of fat generates approximately 8.63 kcal of energy and produces approximately 1 gram of water. (The hydrogen atoms in the fat molecule are transferred to oxygen to form water.) What fraction of your need for water will be provided by fat metabolism?______________ %
- A 160 g copper bowl contains 120 g of water, both at 25.0°C. A very hot 420 g copper cylinder is dropped into the water, causing the water to boil, with 5,00 g being converted to steam. The final temperature of the system is 100°C. Neglect energy transfers with the environment. (a) How much energy is transferred to the water as heat? (b) How much to the bowl? (c) What is the original temperature of the cylinder? The specific heat of water is 1 cal/g-K, and of copper is 0.0923 cal/g-K. The latent heat of vaporization of water is 539 Cal/kg.A small electric immersion heater is used to heat 79 g of water for a cup of instant coffee. The heater is labeled “72 watts" (it converts electrical energy to thermal energy at this rate). Calculate the time required to bring all this water from 20°C to 100°C, ignoring any heat losses. (The specific heat of water is 4186 J/kg-K.) Number UnitsRubbing your hands together warms them by converting work into thermal energy. If a woman rubs her hands back and forth for a total of 10 rubs, at a distance of 7.50 cm per rub, and with a frictional force of 50.0 N, what is the temperature increase in degrees Celsius? The mass of tissue warmed is only 0.100 kg, mostly in the palms and fingers.