Kilowatt-Hour per Unit of Fuel. The energy value of a unit of fuel depends on its mass, carbon and hydrogen content, and the ratio of carbon to hydrogen. In general, hydrogen generates approximately 62,000 BTU per pound and carbon generates around 14,500 BTUs per pound.
Quick Answer. The three largest rivers in Portugal are the Tagus River, the Douro River and the Guadiana River. All three rivers also flow through Spain. The largest river in Portugal is the Tagus River; it is 645 miles long. Continue Reading.
The Parque Natural da Serra de SÃ£o Mamede is one of 30 officially protected parks in Portugal. Places to Visit in Alentejo. One of the most popular places to visit in Alentejo is Ãvora, once the capital of Portugal and witness to the Roman and Moorish civilizations. Other notable towns include Alcacer do Sal, Regengos de Monsaraz, Estremoz, Arraiolos and Marvao.