この番組は五時間放送されるって英語でなんて言うの？

!. To be on air = to be broadcast on TV or radio.
"The quiz show will be on air at 7pm."
2. To last = the period something will take between start and finish.
"The race is expected to last 5 minutes."
3. Running time = the length of a TV or radio programme.
"The usual running time of the 6 o'clock news is 15 minutes."

"The program will be aired for 5 hours."
This means that the program will be broadcast for 5 hours.

"The program will be shown on TV for 5 hours."
This means that people will be able to watch that specific program for 5 hours.

A) The program will be on TV for 5 hours.
Program -a planned series of future events or performances.
Example -"a weekly program of films"
5 - Number five

B) The duration of the TV program is 5 hours.
*Duration -the time during which something continues.
Example -"bicycle hire for the duration of your holiday"

I hope this helps :-)

時間の長さをいう時は、for .... hours (minutes, days)が良いです。
(be) on air, be broadcast は両方とも「放送される」意味ですが、on airのほうがカジュアルです。
なお、broadcast の過去分詞はbroadcastedではなく、broadcastになるので、要注意です！

This is a 5 hour show.
'5 hour' - this describes the duration of the show/ how long the show will last.
'This' refers to the show.

The TV show is going to last 5 hours.
This lets the person know the duration of the show.

Note: You can use the name of the show to make the statement more specific.

The programme is on for 5 hours
It lasts for 5 hours
The programme starts at 7pm and finishes at 12am
The show is on for 5 hours
The tv show is 5 hours long