A dietician develops a new diet, in which people drink copious amounts of ice water. The theory is that the body must raise the temperature from 0.0 deg C to body temperature (37.0 deg C), and will use energy (therefore burning fat) to achieve this. If it takes 3500 Cal (3500 kcal) of energy output to burn off 454 g (about 1 pound) of fat, how much ice water (in L) must be consumed to achieve this? (Useful information: 1 L = 1000 cm3; density of water = 1 g/cm3; specific heat of water = 1 cal/g deg C)

Q: A jogger applies an ice pack to their injured leg that contains 0.608 L of water at 4 °C. How many…

A: Volume of water = V = 0.608 L = 608 ml Initial temperature of water = Ti=4° C Final temperature of…

Q: A steam pipe is covered with 1.25 cm thick insulating material of thermal conductivity 0.200 W / m.…

A: Given:- Length of material = 1.25 cm thick = 0.0125 m k= 0.200 W/m.oc = 0.200 * 100 * 4.186 = 83.7…

Q: A 37 g sample of copper is at 22°C. If 821 J of energy are added to the copper, what is its final…

A: Given The mass of the copper is m = 37 g = 37 x 10-3 kg. The initial temperature is Ti = 22°C.  The…

Q: An aluminum rod is 16.9 cm long at 20°C and has a mass of 350 g. If 11,500 J of energy is added to…

A:

Q: Approximately how much heat must be removed from 0.5 kg of 50 °C water to freeze it into 0 °C ice?…

A: Given data: Mass of water m= 0.5 Kg The initial temperature of the water, Ti= 273+50 K=323K The…

Q: С. 25% D. 0.0075% E. 10% 9. The specific heat of water is 4186 J/kg- C, which is twice higher than…

A:

Q: 9.3°C . At what rate in watts must the person transfer thermal energy to reduce the the body…

A: Given Mass of person m =60 kg Body initial temperature = 39.3 0 C FFinal temperature = 370 C TTime…

Q: Two 50-g ice cubes are placed into 0.2kg of water in a Styrofoam cup. The water is initially at a…

A: Two 50-g ice cubes are placed into 0.2kg of water in a Styrofoam cup. The water is initially at a…

Q: A block of 10.0 kg of solid gold at its melting point of 1,063.00°C changes phase to liquid gold at…

A: Given data: The mass of block is m=10 kg. The melting temperature is T=1063℃. The latent heat of…

Q: A 0.766 kg sample of lead is in its solid state at it freezing temperature of 328 C. If 5.11e3 J of…

A: Mass of lead that can be converted into liquid from solid state using 5.11×103 J of energy is,

Q: - The increase in internal energy of 1kg of water at 100°C when it is converted into steam at the…

A:

Q: An aluminum cup of 250 cm^3 capacity is completely filled with glycerin at 25 C. How much glycerin,…

A: Calculate the change in volume of the glycerin when the temperature of the system is raised from…

Q: the mine transfers enough energy by heat to the mine's cooling systems to melt 363147 kg of ice at…

A: Given : Mass of ice (m) = 363147 kg Energy increased by 9.3 % Latent Heat of fusion of Ice (L) =…

Q: The average thermal conductivity of the walls (including windows) and roof of a house in Figure…

A: The height of the triangular section of the support that holds the roof is:

Q: How much heat is required to melt 200 g of ice at 0 oC into water at 0 oC? The latent heat of fusion…

A: Here,  m = 200g  Lf = 80 cal/g

Q: A 648-g empty iron kettle is put on a stove. How much heat, in joules, must it absorb to raise its…

A: The specific heat for iron is  C = 113 cal/kg·C 1 cal = 4.1 90 J. mass of kettle is m = 648 g m =…

Q: a container has 0.3 kg of water and 0.5 kg of ice at 273 K. How much water vapor should be…

A:

Q: Imagine that a hypothetical life form is discovered on our moon and transported to Earth. On a hot…

A: The heat of vaporization of the extraterrestrial life form = 167 cal/g. Mass of the sweat lost, m =…

Q: A room has a pine ceiling (k = 0.12 WI(m-Cº) ] that measures 3.0 m x 4.0 m 2.0 cm. On a cold day,…

A: We need to calculate how much energy will be saved if we use wool as an insulator.

Q: 2m2 of water is converted into 2050 m3 of steam at atmospheric pressure and 100°C temperature. If…

A: From thermodynamics’ first law, the internal energy in the process can be expressed as,

Q: A4 kg sample of mercury is completely solidified and liberates 104 kJ of energy. What is the…

A: The expression for the energy liberated is as follows: Q=mcΔT+mL               1

Q: A cube of aluminum has an edge length of 20 cm. Aluminum has a density 2.7 times that of water (1…

A: Given data:  Edge length of cube (a) = 20 cm Density of aluminium (ρ) = 2.7 g/cm3 Specific heat…

Q: A study showed the average basal metabolic rate of a human to be about 1500 kcal/day (6279 kJ/day).…

A: Given information; Here, Q is the heat released in 24 hours from the body due to the metabolism…

Q: The temperature of water in a swimming pool decreases by 5.0 K during the night. The mass of the…

A: Given, The temperature of water decreases by 5 k mass of water in the pool is 560,000 kg specific…

Q: In an electrically heated home, the temperature of the ground in contact with a concrete basement…

A: Given information: Here, To and Ti are the temperature of the wall’s outside and inside surface…

Q: What is the rate of energy loss through a 4.5 m x 1.0 m rectangular glass windowpane that is 0.00400…

A: The given values are, A=4.5 m×1.0 m∆x=0.00400 mTi=18° CTo=2.0° Ck=0.75 W/m·°C

Q: What is the minimum amount of energy required to completely melt a 7.25kg lead brick which has a…

A:

Q: What is the minimum amount of energy required to completely melt a 6.72 kg lead brick which has a…

A:

Q: In Rusayl cable factory, 150 kg of raw copper is molten to make wires and cables. If 20.1 MJ of heat…

A: The expression for latent heat of fusion is given by Q=mLL=QmL=20.1 MJ150 kgL=0.134 MJkg

Q: A block of 10.0 kg of solid gold at its melting point of 1,063.00°C changes phase to liquid gold at…

A: SOlution: Given that m = 10 kg L =  6.44×104 J/kg

Q: A certain diet doctor encourages people to diet by drinking ice water. His theory is that the body…

A: Given information: Here, Ti and Tf are the ice and the body temperature respectively, Qrequired is…

Q: Super Invar, an alloy of iron and nickel, is a strong material with a very low coefficient of…

A:

Q: A student wants to lose some weight. He knows that rigorous aerobic activity uses about 700 kcal/h…

A:

Q: How much energy would have to be added to 516grams of water to heat it from 14.0°C to 87.0°C?…

A: Given data:   Mass (m) = 561 g Initial temperature (Ti) = 14.0°C Final temperature (Tf) = 87.0°C…

Q: A 600-g piece of tin absorbs 1000 J of heat. By how much will its temperature change? (ctin = 227…

A:

Q: A 22 kg sample of ice is at 0.00° C. How much heat is needed to melt it? (For water L=334 kJ/kg and…

A:

Q: After eating a 200 g bottle of yogurt, Bob decides to go for a run to burn off the extra energy. The…

A: Given: Mass of the yogurt eaten by bob = 200 g Energy from the yogurt = 5.4 MJ/kg Metabolic rate of…

Q: 2m' of water is converted into 2050 m of steam at atmospheric pressure and 100°C temperature. If 4.0…

A: From first law of thermodynamics…

Q: The same amount of heat entering identical masses of different substances produces different…

A: The expression for find final temperature of object is Tf=Qmc+Ti a) For water,…

Q: How many kilograms of water at 100.0°C can be vaporized if 1278900 J of heat are added to the water?…

A: Heat added to water Q= 1278900 J Latent heat of vapourisation = 2.26 x 106 J/kg Let m = vapour…

Q: During a bout with the flu an 80 kg man ran a fever of 39.0°C (102.2°F) instead of the normal body…

A: Heat required is Q= mcΔT  specific heat c for aluminium is : 900 J/kg.K ΔT = 39 -37 oC = 2oC.

Q: 3.00 moles of an ideal gas that occupies a volume of 20.0 L at a temperature of 20.0°C undergoes an…

A:

Q: In Rusayl cable factory, 150 kg of raw copper is molten to make wires and cables. If 20.1 MJ of heat…

A: Given: The mass of raw copper is m=150 kg. The heat required is Q=20.1 MJ.   The expression of…

Q: A bullet of mass 10 g moving with speed of 9ung y 210 m/s in stopped suddenly. If all its kinetic…

A:

Q: In an electrically heated home, the temperature of the ground in contact with a concrete basement…

A: the expression for amount of heat produced per second is,

Q: How much heat is absorbed by 100 g of ice at -10⁰C to become water at 20⁰C?

A:

First law of Thermodynamics

The word thermodynamics consists of two words: thermo- and dynamics. Dynamics means the study of motion. The field of thermodynamics is all about the study of the movement of heat. In a more meaningful way, it is stated as the study of the transfer of energy. Energy transfer is something that we encounter in day-to-day life. Automobiles, chemical reactions, refrigerators, and power generators work on the basis of thermodynamic principles.