Arigid tank contains 10 kg of water at 90°c. if 8 kg of the water is in the liquid form and rest is in vapor form determine: (a) pressure in the tank (b) volume of the tank

The pressure in the tank is 70.183 kPa and the volume of the tank is 4.73

Explanation:

Given that 8 kg of the water is in the liquid form and rest is in vapor we can say that the tank contains a saturated liquid-vapor mixture. Since the two phases coexist in equilibrium, the pressure must be the saturation pressure at the given temperature.

Use the Saturated water - Temperature table to find the pressure

From the Saturated water - Temperature table at 90 °C, we know that and .

To find the volume of the tank you can determine the volume occupied by each phase and then add them:

Volume of the liquid phase =

Volume of the vapor phase =

Volume of the tank = Volume of the liquid phase + Volume of the vapor phase

Volume of the tank =  + = 4.73

Cis the

Mass is the amount of matter in an object.  weight is the measurement of the pull of gravity on an object.  say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165)  now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon.  however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant.  in conclusion it is possible for your weight to change as your mass remains constant.