¿Cuál de los siguientes elementos no es necesario para calcular la pérdida de calor mediante el aislamiento?
a. El factor K
b. El tipo de superficie de los materiales
c. La cantidad de combustible necesaria para producir vapor
d. La temperatura ambiente
c. La cantidad de combustible necesaria para producir vapor
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The most commonly used size for gypsum boards is
A) 4 ft × 8 ft. B) 4 ft 6 in. × 8 ft. C) 3 ft × 6 ft. D) 4 ft × 8 ft 6 in. E) 4 ft × 4 ft.
This problem concerns a compound for which the following information is available:
• The triple point is located at P=0.8 atm and T=300 K. • The critical point is located at P=40 atm and T=650 K. • The acentric factor is 0.25. • At P=1 atm, boils at 314 K. • At P=1 atm, the molar volume is 0.12 L/mol for solid and 0.132 L/mol for liquid. • At the triple point, the enthalpy of fusion/melting is 5000 J/mol. Give your best estimate of each of the following: A) The enthalpy of vaporization at the triple point. B) The vapor pressure at 305 K. C) The vapor pressure at 500 K. D) The pressure at which the compound has a melting temperature of 301 K.
What is the fee received for selling on consignment called?
What will be an ideal response?
What does 7 represent on the pH scale?
a. acid c. alkaline b. basic d. neutral