A microwave oven has a power requirement of 1,239 W. A frozen dinner requires 4.4 min to heat on full power. (a) How much electrical energy (in kWh) is used?  ____ kWh (b) If the cost of electricity is 15¢ per kWh, how much does it cost to heat the dinner? (Do not round your final answer. Fractional cent values are acceptable.) ____ ¢

Q: You have a 15.0 gram sample of gold at 20.0°C. How much heat does it take to raise the temperature…

A: Heat supplied, Q = msdt

Q: How much heat is needed to heat 26.9 grams of metal from 19 degrees C to 101 degrees C? The specific…

A:

Q: An adult eats food whose nutritional energy totals approximately 2100 CalCal per day. The adult…

A: Given nutritional energy = 2100 cal Calories burnt = 1800 cal

Q: A Big Mac hamburger from McDonald’s contains 540 Calories. (a) How many kilojoules does a Big Mac…

A: The conversion formula between kcal and kJ is shown below. 1 kcal = 4.184 kJ The relation between…

Q: Which has more kinetic energy: a 0.0018-kg bullet traveling at 403 m/s or a 5.3  107-kg ocean liner…

A: As we know kinetic energy involved the motion. Therefore the formula we are going to use to…

Q: The specific heat of iron is 0.110 cal/g celcius. The heat of fusion of iron is 63.7 cal/g. The…

A: Answer: It is a 2 step process 1. Heating of solid iron up to its melting point 2. Melting of solid…

Q: how can you use the physical properties of melting solubility and conductivity to classify ionic and…

A: Ionic compounds have high melting point due to strong intermolecular force of attraction between the…

Q: A gram of gasoline produces 45.0 kJ of energy when burned. Gasoline has a density of 0.77 g/mL. How…

A: The energy released by 1 g of gasoline = 45.0 kJDensity of gasoline = 0.77 g/mLVolume of gasoline =…

Q: In metric terms, a typical automobile averages 5.72 km/L of gasoline burned. Gasoline has a heat of…

A:

Q: If 1001 J of heat is available, what is the mass in grams of iron (specific heat = 0.450 J/g･°C)…

A: Given Heat ( Q ) = 1001 Joule  Specific heat ( s ) = 0.450 Joule/gram℃  Initial temperature ( T1 ) =…

Q: A microwave at 600 watts heats up a cup of water of 150ml from 20 degrees Celsius to 61 degrees…

A: The density of water is 1.0 g/mL. Therefore, mass of 150 mL water is 150 g.

Q: 54. Perform each conversion. (a) 345 Cal to kilowatt-hours (b) 23 J to calories (c) 5.7 × 10° J to…

A: Hi, since you have posted questions with multiple subparts we will answer first three subparts for…

Q: The specific heat of lead is 0.13 J/g ^ C . How much heat (in J) is required to raise the…

A: Given that : The specific heat of lead (C) is 0.13 J/g°C. Mass of lead (m) = 109.5 g Change in…

Q: How much energy is necessary to heat 8.0 kg of water from room temperature (20°C) to its boiling…

A: GivenMass of water given = 8kg                                 = 8000gDifference in temperature=…

Q: Macmillan Learning Classify the chemical changes as endothermic or exothermic. 7 # 3 E D C Anser…

A: An Exothermic Reaction is a reaction which releases energy as heat to the surrounding. Whereas an…

Q: What is the specific heat of a substance in kJ/kg K that absorbs 2500 joules of heat when a sample…

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Q: A heat pump is an electrical device that heats a building by pumping heat in from the cold outside.…

A:

Q: A piece of a mysterious metal has a mass of 455g. It was determined that its heat capacity is 34.3…

A: The heat capacity of a given substance is defined as the amount to heat required to raise the…

Q: An adult eats food whose nutritional energy totals approximately 2100 CalCal per day. The adult…

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Q: What is the specific heat capacity of the metal?

A:

Q: a ball has a kinetic energy of 106 J. If the ball is moving at a velocity of 2.51 m/s, what is the…

A: Since , Kinetic energy =1/2 mv 2 Where m = mass (in kg ) V= speed (in ms -1)

Q: If a battery releases 566.8 J of energy and 201 J are used for work, how much energy is released as…

A: Given : Total energy released by battery = 566.8 J Energy used for work = 201 J

Q: A 19.0 gram sample of iron is initially at 414.0 °C. It loses 192.0 J of heat to its surroundings.…

A:

Q: You are performing an experiment where you place 6.4673 g of Al metal at 209.82 C into a coffee cup…

A: Given, mass of Al metal =6.4673 g at 209.82 °CA coffee cup calorimeter that contains 87 g of water…

Q: A peanut butter sandwich provides about 1.1 ✕ 103 kJ of energy. A typical adult uses about 95…

A: The solution I have typed below.Explanation:Step 1:A peanut butter sandwich provides energy equals…

Q: A When sodium is exposed to chlorine, a violent chemical reaction occurs and sodium chloride (salt)…

A:

Q: If 10.27 kJ of heat is given off when 51.93 g of unknown acid condenses from vapor to liquid, what…

A: Condensation is a process of conversion of vapor to liquid. Enthalpy of condensation is the enthalpy…

Q: 2. A fast food item contains 1130 calories. Convert this energy to Joules. (1 cal=4.184 J)

A:

Q: How much heat in kJ must be added to 175 g of w

A: Specific heat capacity of any material (represented as c) is amount of heat required to raise 1 gram…

Q: A home swimming pool contains 15 m3 of water. At the beginning of the swimming season, the water…

A: Volume of water = 15 m3Density of water = 1000 kg/m3Mass of water = volume x density = (15 m3) x…

Q: heat i

A:

Q: A coal-burning power plant generates electrical power at a rate of 950 megawatts (MW), or 9.50 x 108…

A: The power is defined as the amount of energy transferred per unit time.

Q: Determine the mass of a sample of aluminum if losing 5,150 joules of heat causes its temperature to…

A:

Q: Between O*C and 30 degrees * C mercury has a specific heat of 0.138 J/g C. If 200 J of heat are…

A:

Q: Calculate the amount of heat needed to boil 110. g of benzene (CH), beginning from a temperature of…

A: 110.0 g of benzene C6H6 is started to heat from a temperature of 17.8 °C .We have to calculate the…

Q: Find the final temperature of water given an initial temperature of 28 ˚ C, a mass of 8 g, heat (q)…

A: Initial temperature of water (T1) = 28°C Mass of water (m) = 8 g Heat absorbed (q) = 184 J Specific…

Q: A 489.9 gram sample of aluminum is initially at 25.7 C. It absorbs 38.27 kJ of heat from its…

A:

Q: What is the specific heat of an object that weighs 15 grams and changes temperature from 30 degrees…

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Q: -ntify the following as exothermic or endothermic. q = -1200 J AH = 527 kJ Two chemicals mis…

A: 1)     q = -1200 J   HEAT GIVEN BY THE SYSTEM IS TAKEN AS NEGATIVE,CLEARLY HEAT IS GETTING OUT OF…

Q: What mass of natural gas (CH4) must you burn to emit 329 kJ of heat? CH₂(g) + 20₂(g) → CO₂(g) +…

A:

Q: he density of liquid oxygen at its boiling point is 1.14 kg/L , and its heat of vaporization is 213…

A: Heat of vaporization for 1 kg of liquid oxygen = 213 kJ

Q: AH = m c AT 1. Zinc at 50 °C was heated to 100°C. A total of 4,000 J of heat were added to make this…

A: given values are- ∆H = heat =  4000 J c = specific heat = 0.40 J/g 0 C ∆T = change in temp= final…

Q: Solve these as conversions (start with 1 unit) or formulas.    What is the energy needed if the heat…

A: Given information: Heat capacity = 1919 J/g Mass = 222 g

Q: How much heat, in kJ, does it take to heat a 3 kg block of aluminum (specific heat capacity = 0.897…

A:

Q: A water heater contains 54 gal of water. How many kilowatt-hours of energy are necessary to heat the…

A: Step 1-We have to calculate the value of energy in kilowatt hours necessary to heat the given water…