A 5.7 kg of air initially at 28.2 °C is contained in a sealed vessel to ensure that no air will diffuse and out of it.  A motor that produces 25 J is then intricately attached to the vessel to continuously stir the air inside. If there is no internal energy change in the system, what would be the final temperature of the air inside the vessel in K? For the physical and chemical data refer to Perry's Chemical Engineering Handbook

(4) Determine the steady-state surface temperature of an electric cable 25 cm in diameter and 300 cm in length, which is suspended horizontally in still air in which heat is dissipated by the cable at a rate 26 W per meter of length. The air temperature is A °C. [Hints: (i) Use Churchill & Chu horizontal cylinder equation for the prediction of natural convection heat transfer coefficient. (ii) Initial guess of surface temperature = 35 °C]. State your assumptions, if any. Your parameter value for (A) will be based on the last digit of your student number. e.g. If your metric card number is A0185796Y, please take the (A) value from parameter set (6) below. A similar rule is applied to other cases. (0) A = 20 (4) A = 24 (8) A = 28 (1) A = 21 (5) A = 25 (9) A = 30 (2) A = 22 (6) A = 26 (3) A = 23 (7) A = 27

Consider how the Beer Heater impacts multiple aspects of distillation columns used in the bourbon industry. In these continuous distillation columns, name three three parameters that are coupled with each other?

3 An electrical current of 700 A flows through a stainless steel cable having a diameter of 5 mm and an electrical resistance of 6 x 104 /m (i.e., per meter of cable length). The cable is in an environment having a tem- perature of 30°C, and the total coefficient associated with convection and radiation between the cable and the environment is approximately 25 W/m².K. (a) If the cable is bare, what is its surface temperature? (b) If a very thin coating of electrical insulation is applied to the cable, with a contact resistance of 0.02 m² K/W, what are the insulation and cable surface temperatures? (c) There is some concern about the ability of the insula- tion to withstand elevated temperatures. What thick- ness of this insulation (k = 0.5 W/m .K) will yield the lowest value of the maximum insulation temper- ature? What is the value of the maximum tempera- ture when this thickness is used? Note: The 25 W/m²K includes not only convection but also radiation.

(a) What is the heat loss per unit length of the pipe?(b) The pipe material is switched to PTFE (k = 0.38 W/(m⋅K)). To maintain the same heat loss as theprevious question, if all other parameters are to remain the same as before, what is the required thicknessof the pipe wall in centimeters?

plz write neatly, do not copy and paste solution

Question is from the class of Heat Transfer please show all steps, Thank you.

When two objects at different temperatures are brought into contact with one another (such as a hot steel bar dropped into cold water), the cold object will O increase in temperature to the same temperature as the hot object before being placed in the water. O lose as much heat as the hot object loses the cold object will remain unchanged O gain as much heat as the hot object loses

2 A wire of diameter D = 2 mm and uniform temperature T has an electrical resistance of 0.01 N/m and a current flow of 20 A. (a) What is the rate at which heat is dissipated per unit length of wire? What is the heat dissipation per unit volume within the wire? (b) If the wire is not insulated and is in ambient air and large surroundings for which T = Tsur = 20°C, what is the temperature T of the wire? The wire has an emissivity of 0.3, and the coefficient associated with heat transfer by natural convection may be approximated by an expression of the form, h = C[(T-T)/D]¹/4, where C = 1.25 W/m7/4.K5/4 (c) If the wire is coated with plastic insulation of 2-mm thickness and a thermal conductivity of 0.25 W/m.K, what are the inner and outer surface temperatures of the insulation? The insulation has an emissivity of 0.9, and the convection coefficient is given by the expression of part (b). Explore the effect of the insu- lation thickness on the surface temperatures. Note: 1. The metal wire…

A food product with 73% moisture content in a 10 cm diameter can wants to be frozen. The density of the product is 970 kg / m³, the thermal conductivity is 1.2 W / (m K), and the initial freezing temperature is -2.5 ° C. After 14 hours in the freezing medium -40 ° C, the product temperature becomes -10 ° C. Estimate the convection heat transfer coefficient of the freezing medium. Assume the can as an infinite cylinder. h = Answer W / (m² K).