Question

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Answer 1

Answer:

As indicated by the heats of reaction, the combustion reactions are exothermic (and fast), whereas some of the gasification reactions are endothermic (and slower). Usually, the heat required to induce the endothermic gasification reactions is provided by combustion or partial combustion of some of the coal.

Explanation:

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Answer 2

Answer:

Medical masks are surgical or procedure masks that are flat or pleated (some are like cups); they are affixed to the head with strapsa. Wearing a medical mask is one of the prevention measures to limit spread of certain respiratory diseases, including 2019- nCoV, in affected areas.

However, the use of a mask alone is insufficient to provide the adequate level of protection and other equally relevant measures should be adopted. If masks are to be used, this measure must be combined with hand hygiene and other IPC measures to prevent the human-to- human transmission of 2019-nCov.