Answer:
No, Tom should not accept the offer because it creates a conflict of interest.
Step-by-step explanation:
By accepting the invitation, Tom may feel obliged to choose the valves manufactured by the salesperson's firm, even if they are not the best choice for the chemical plant. This could potentially harm the plant's performance, safety, and profitability. It is important for Tom to base his decision solely on objective and professional criteria, without being influenced by personal favors or gifts.