Saturated steam at 280 °C flows inside a pipe at rate of 0.02 kg / s * epsilon . Pipe ID = 5.5 cm and OD = 6 cm. Pipe is covered with 3 cm thick material which has thermal conductivity of k=0.06 W/m^ C If pipe be 30 m long, and heat transfer coefficient of steam be 15000 W/m^ 2 ^ C and heat be transferred to environment of T infty =27^ C, determine, quality of steam at exit of the pipe, as well as rate of condensation along the pipe length. For steam at 280 degrees * C . h g =2779 kJ/kg. and h_{f} = 1235 kJ/kg. Hint any assumption must verified.

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).

gas

explanation:

smoke is the matter of a gas