A sample of iron absorbs 63.2 J of heat, upon which the temperature of the sample increases from 20.9°C to 29.6C. If the specific heat of iron is 0.450 Jig-K, what is the mass (in grams) of the sample? 16.1 g O 16.1g O 3.27 g 0.0619 g 3.92 g Submit Previous Answers Request Answer
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- THERMODYNAMICS UPVOTE WILL BE GIVEN. PLEASE WRITE THE COMPLETE SOLUTIONS. NO LONG EXPLANATION NEEDED. BOX THE FINAL ANSWER AND USE 3 DECIMAL PLACES. A gas, whose composition is not known, has 40 BTU of paddle-work input at a constant volume of 20 ft3 from 20 psia and 80°F to 180°F. What are change of internal energy and heat if k =1.21? (ANS: 65.3, 25.3BTU)A 5-kg block of copper is heated from -100°C to 100°C. Determine the change of internal energy of the block in kJ. Assume that specific heats are evaluated at the average temperature, in °C. Report your answer to the nearest whole number, rounding if necessary.The specific heat capacity of steel is 450 J/kg⋅∘CJ/kg⋅∘C. Find the amount of heat that is needed to raise the temperature of a 5.0-kgkg piece of steel from 0 ∘C∘C to 130 ∘C∘C. Express your answer to two significant figures and include the appropriate units. Q= ? How does this compare with the heat needed to raise the temperature of the same mass of water through the same temperature difference? (For water, cc = 4190 J/kg⋅∘CJ/kg⋅∘C.) Express your answer using two significant figures. Qwater/Qsteel= ?
- Suppose we have a piece of a candy bar that has an initial mass of 28g. If we ignite the piece of candy bar (literally burn it), and it increases the temperature of 285.23g of water from 18.95°C to 77.43°C, how many calories per gram of energy did the candy bar provide if the final mass of the marshmallow is 4.45? Note: 1.00 cal = 4.184 J. Give your answer in units of cal/g.12. 3 kg of liquid water initially at 12°C is to be heated at 95°C in a teapot equipped with a 1200-W electric heating element inside. The specific heat of water can be taken to be 4.18 kJ/kg · °C, and the heat loss from the water during heating can be neglected. Solve for the time it takes to heat water to the desired temperature. (3 DECIMAL IN FINAL ANSWER PLS)The rate of heat transferred between air and condensing refrigerant in a condenser is 70 kW. The condenser has an air-side area of 210 m2 and a U value based on this area of 0.037 kW/m2 -oC. It is supplied with 6.6 m3/s of air which has a density of 1.15 kgm/m3. If the condensing temperature is 55 oC, Determine the temperature of inlet air. (for decimal places for final answer)
- You run the same type of experiment with an unknown mass of silver that began at 75.0˚C and had a final temperature of 32.5˚C. If the silver was placed in 0.325 kg of water at an initial temperature of 20.0oC, what was the mass of silver used? (cAg= 235 J/kg°C)The amount of heat required to change the temperature of a material from T1 to T2 isgiven by Q= mCp(T2-T1). Using this equation, answer the following:a. How many BTU’s of heat are required to cook a beef roast weighing 10 lb from 40 to 130oF?, Cp = 0.8 BTU/lboFb. Convert the number of BTU’s of heat in watt hours.c. If this roast is heated in a microwave oven having an output of 200 watts, how long will it take to cook the roast?A kettle contains half liter of water at 30°C is heated in a stove. The heat transfer rate is 5 KW. Determine the amount of water in ml left in the kettle after 2 minutes. ANSWER: 299.09 ml
- An air-cooled condenser has an expected U value of 30 W/m2∙K based on the airside. The condenser is to transfer 60 kW with an airflow rate of 15 kg/s entering at 35°C. If the condensing temperature is to be 48°C, what is the required airside area in m2? Round your answer to 2 decimal places. heat transferI. Multiple Choice. Write the complete answer on the answer sheet (ex. 1. a. answer )1. The equation CP = CV + R applies to which of the following?a. Enthalpyb. Ideal gasc. Two phase statesd. All pure substance2. In the flow process, neglecting kinetic and potential energies, the integral of Vdprepresents what?a. Heat transferb. Flow energyc. Enthalpy changed. Shaft work3. Mechanical energy of pressure transformed into energy of heat.a. Kinetic energyb. Enthalpyc. Heat exchangerd. Heat of compression4. If the pressure of a gas is constant the volume is directly proportional to theabsolute temperature.a. Boyle’s lawb. Joule’s lawc. Charles’s lawd. Kelvin’s law5. Work energy can be a function of all the following except:a. Force and distance b. Power and timec. Force and timed. Temperature and entropyI have some things that need clarification based on the answer provided to this question. Firstly, the h1 value came out as 154.99 kJ/Kg for me not 153.318. Also, the values taken from the steam table for Vf and Vg for 5 degrees celcius and 6 degrees are different from what is on the steam table, I have attached a picture for this. For 5 degrees on the steam table it shows Vf as 0.00100008 and Vg as 147.011 and for 6 degrees it shows Vf as 0.00100011 and Vg as 137.633. Please clarify this and reply as soon as possible. Thanks