När mötet är slut ska jag avsluta samtalet och gå hem.

Because Swedish has V2 word order in main clauses: the finite verb normally comes in the second position.

In this sentence, the whole time clause När mötet är slut comes first. That counts as the first element, so the finite verb in the main clause, ska, must come next:

När mötet är slut | ska | jag avsluta samtalet och gå hem.

So the word order becomes:

• first: the time clause
• second: ska
• then: jag

If you started with the main clause instead, you would say:

Jag ska avsluta samtalet och gå hem när mötet är slut.

Then jag ska is correct.

När means when and is used for something that is expected to happen, not something uncertain like if.

So När mötet är slut means when the meeting is over.

A learner might compare:

• När mötet är slut = when the meeting is over
• Om mötet är slut = if the meeting is over

Here the meeting ending is treated as a normal future event, so När is the natural choice.

Those are the definite forms of the nouns:

• ett möte = a meeting

• mötet = the meeting

• ett samtal = a conversation / a call
• samtalet = the conversation / the call

Swedish often puts the definite article at the end of the noun instead of using a separate word like English the.

In this sentence, both nouns are definite because they refer to specific things already understood from context:

• the meeting
• the conversation / the call

Är slut literally means something like is over / is finished. This is a very common Swedish way to describe the state of something after it has ended.

So:

• Mötet är slut = the meeting is over

You could also say:

• När mötet slutar = when the meeting ends

But there is a small difference in feel:

• är slut focuses on the state of being finished
• slutar focuses on the event/process of ending

In many everyday situations, both are possible, but är slut is very common and natural.

This is a very common learner question.

Sluta usually means stop or end, often without a direct object, or in the sense of stopping an activity:

• Mötet slutar klockan tre. = The meeting ends at three.
• Jag ska sluta röka. = I’m going to quit smoking.

Avsluta usually means finish/end something and is more clearly transitive, meaning it often takes an object:

• avsluta samtalet = end the conversation / end the call
• avsluta mötet = conclude the meeting

So in this sentence, avsluta samtalet is used because the speaker is actively bringing the conversation/call to an end.

It can mean either, depending on context.

• ett samtal = a conversation
• ett telefonsamtal = a phone call

In everyday Swedish, samtal can sometimes refer to a call if the situation makes that clear. So avsluta samtalet could mean:

• end the conversation
• end the phone call

The surrounding context tells you which one is meant.

Because hem is an adverb meaning home(wards), and Swedish normally uses it directly after verbs of movement.

So:

• gå hem = go home
• komma hem = come home
• åka hem = go home / travel home

You do not normally say gå till hem.

A useful contrast is:

• Jag går hem. = I am going home.
• Jag är hemma. = I am at home.

So:

• hem = motion toward home
• hemma = being at home

Because after the modal verb ska, Swedish uses the bare infinitive.

So:

• ska avsluta
• ska gå

not:

• ska att avsluta
• ska att gå

Also, when two infinitives are linked by och, you do not need to repeat ska:

• ska jag avsluta samtalet och gå hem

This means:

• I will end the conversation/call and go home

Both avsluta and gå depend on ska.

Yes. Swedish allows both of these:

• När mötet är slut ska jag avsluta samtalet och gå hem.
• Jag ska avsluta samtalet och gå hem när mötet är slut.

They mean essentially the same thing, but the emphasis is a little different.

Starting with När mötet är slut puts the time frame first, which can sound slightly more structured or emphasize when this will happen.

Starting with Jag ska... puts the speaker’s plan first.

Both are natural.

Usually, no. In modern Swedish, a comma before the main clause after an initial subordinate clause is often omitted.

So this is normal:

När mötet är slut ska jag avsluta samtalet och gå hem.

You may sometimes see a comma, especially in older writing or if the writer wants a pause:

När mötet är slut, ska jag avsluta samtalet och gå hem.

But in standard modern Swedish, the version without the comma is more typical.