Answer to Question #341309 in Mechanical Engineering for dads

Mechanical Engineering

Question #341309

how many kg of hot water at 80C must me added to cold water at 15C in order to make a 1.5kg mixture at 25C? Neglect heat losses

Expert's answer

Heat balance says

cm_1(t_3-t_1)=cm_2(t_2-t_3)

m_1+m_2=m

m_1(25-15)=m_2(80-25)\\ m_1+m_2=1.5

Solution of this system of equations

m_1=1.27\:{\rm kg}\\ m_2=0.23\:\rm kg

Learn more about our help with Assignments: Mechanical Engineering

Comments

No comments. Be the first!

Leave a comment

Related Questions

1. a reversible heat engine absorbs 1000 kilo cal of heat at 327 degree Celsius and produces a work and
2. A spring-mass system, with m = 100 kg and k = 400 N/m, is subjected to a harmonic force f(t)= F0 cos
3. As shown below in the figure, a bracket with a solid circular cross-section of radius r = 67 mm is i
4. A single-threaded worm has an axial pitch of 20 mm and a pitch diameter of 50 mm. The worm rotates a
5. (a) Air at 2.01 bar, 27° C, initially occupying a volume of 0.015 m3, is compressed reversibly a
6. a four-cylinder petrol engine has a swept volume of 2000 cm3 and a clearance volume in each cylinder
7. QI: NGO ii - CLO 2 - PI-24 In an epicyclic gear train, an arm carries two gears 1 and 2 having 40 an