The amount of heat needed to change the temperature of an object can be calculated using the f equation: Q = mc,AT where Q = amount of heat in Joules (J) m = mass of object in kilograms (kg) = specific heat of object AT = change in temperature in °C What is the appropriate unit for c, if the preceding equation is to be homogeneous in units?

Q: 3. A long hollow cylinder has inner and outer radii R, and R2, respectively. The temperature of the…

A: Given details, For Hollow Cylinder of  Inner radius=R1 at Temperature T1 Outer radius=R2 at…

Q: A sample of air occupies 145 L at 900 mm Hg. What pressure is required to compress the air to 90 L…

A: Answer is P2 = 1450 mmHg . Pressure required to compress is P2 = 1450 mmHg. Detailed Calculation…

Q: Athin isothermal disk, having a diameter of 1.8 cm, is maintained at 40◦C and buried in a…

A: Given  thermal conductivity k= 0.8 W/m· ◦C  diameter of disk is D = 1.8 cm  radius = 0.9 cm = 0.009…

Q: Given the following information: (kJ/mol) Na(s) -286 NaOH(aq) -470 Hz(9)

A:

Q: You place a 4cm diameter ice-cube into a large bowl of water at constant temperature 15oC, and find…

A: Given,

Q: 4. Which property of a system increases when heat is transferred: (a) at constant volume, (b) at…

A:

Q: A pipe (ID: 130 mm, OD: 165 mm, k=15 W/m²-K, Length: 2 meters)is insulated with several materials,…

A:

Q: What does this graph show?

A: This question is based on data analysis.

Q: Determine the external pressure if ethanol boils at 60 °C?

A: The boiling point of Ethanol at new pressure(P2)=60oC To Calculate the pressure(P2)=?

Q: How many heat are needed to change 50.0 grams of ice at -15.0 °C to steam at 120.0 °C?

A: Given: mass of ice = 50g=50g×kg1000g=0.05kg temperature of ice = -15°C=-15+273K=258K temperature of…

Q: The diffusivity has the same dimension as O a. Density O b. Kinematic viscosity O C. Absolute…

A: Answer: b. Kinematic vicosity

Q: (2) Calculate the Fanning Friction Factor (f) using the formula: = 2.5 In Re, +1.75 8

A: Given, Equation for fanning friction factor is 1f = 2.5lnRef8+1.75    .....1   Here, Reynolds…

Q: Record the T1 and T2 values. How much energy is required to heat 65.0 g ice to from 0 Celsius to 79…

A: Mass (m) = 65 gm T1 = 0 C = 273 K T2 = 79 C = 352 K.  specific heat capacity = 4.184 J/g.C To find :…

Introduction and Basic Calculations in Multiphase Systems

Chemical calculations involve material and energy balance calculations which enable engineers to calculate material and energy requirements in various chemical processes. In addition to this, chemical calculations help to study the behavior and properties of gases, liquids, and their mixtures.