Morgan Silver dollars were not made in 1978. They were minted from 1878 till 1904 and again in 1921. Check your date again and then ask with the correct date.
No Eisenhower dollar coins (1971-1978) regardless of date or mintmark struck for circulation contain silver and have only face value.
The coin is a Eisenhower dollar and has no silver in it.
None.
One dollar.
A 1978-D Eisenhower dollar has no silver in it and is only face value.
One dollar, and they have no silver in them.
The coin is face value.
No such coin exists. Silver dollars were last minted for circulation in 1935, and the last silver dollar sized coin was the Eisenhower dollar of 1971-1978, there was no dollar coin minted in 1967.
The mintmark on a Eisenhower dollar (if it has one) is just above the date.
The coin is a Eisenhower dollar and has no silver in it. Only proof and uncirculated coins from the mint have more than face value.
There is no president on the only silver dollars intended for circulation. All the dollar coins containing silver for general circulation had an image of Liberty and were last minted in 1935. However, the Eisenhower dollar coin minted from 1971-1978 are the same size as the earlier silver dollar coins, but they ones intended for circulation contain absolutely no silver and should not be called silver dollars. These dollar coins minted from 1971-1978 contain a portrait of Dwight Eisenhower on them.
These coins are NOT rare and are worth face.
The US did not make any silver coins dated 1978, if the coin is a large size Eisenhower dollar its likely only face value unless its Proof or Uncirculated.
These coins contain no silver and are worth only face value.
1978 is the last year for the Eisenhower dollar. Only proof and very high grade uncirculated coins are worth more than 1 dollar. None of the coins contain any silver. People call them "Silver Dollars" just because of the size.