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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?
what is break point on chlorination
Objectives After performing this exercise you should be able to: 1. describe the design and organisation of a lab store, 2. suggest modifications in the store design,
leaching
If 2 grammes of zinc granules was reacted with excesss hydrocloric acid to evolued hydrogen gas which came to completion after 5 minutes. Calculate the rate of the chemical in gram
An electron in the conduction band Has a higher energy than an electron in the valence band
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
What is Metallisation Metallisation : metalizing is the procedure of evaporating a film of metal onto products. Normally the same is done in vacuum, therefore called vacuum m
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