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a) The vacuum in the headspace of a can of food is normally formed by "hot fill" exhausting - that is, the cans are closed when the can is filled with product at a temperature of 85°C. However, a batch is inadvertently closed with the product temperature only 50°C. What will be the vacuum (negative gauge pressure) in these cans when they cool to room temperature (25°C)?
b) The gauge on a gas storage cylinder, containing 200 kg of gas, indicates a pressure of 1 MPa at 20°C. How may kilograms of gas remain if the pressure gauge shows 600 kPa when the temperature is 30°C?
Casting is a manufacturing method by which a liquid material is usually poured into a mold, which contains a hollow cavity of the desired shape, and then permitted to solidify. T
In a ferroelectric material, the spontaneous polarization vanishes above Curie temperature.
An organic compound is found to contain 37.5% of C, 3.2% of H and 59.3% of F. The following pressure and volume data were obtained for 1.0g of this substance at 90 degrees celsius
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ACTIVITY 1 to classify hazardous chemicals based on the information given on the labels Requirements Bottles containing chemicals (generally used in a lab) = 20 in number.
Point defects: Point defects are defects which are not extended in space in any dimension. There is no strict limit for how small a "point" defect should be, but typically the ter
Report Note: What do you observe? Do you realise that the common chemicals you have been hadling casually at your laboratory (if any, with which you are working) are quite
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In the dryer air furnace, a natural gas containing 92.5 mole% methane, 4.8% ethane, and the remainder propane is burned with 20% excess air. The fuel enters the furnace at 25°C and
Explain lattice energy The lattice energy of an ionic solid is calculates the strength of bonds in that ionic compound. It is given the symbol U and is equal to the amount o
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