Question
The heat of combustion of ethanol determined in a bomb calorimeter is -670.48 K. Cals mole-1 at 25°C. What is 
at 25°C for the reaction-
- -335.24 K Cals
- -671.08 K Cals
- -670.48 K Cals
- +670.48 K Cals
The correct answer is: -671.08 K Cals
Related Questions to study
The binding energies per nucleon of 
and 
are 5.6 MeV and 7.06 MeV respectively, then the energy of the reaction 
will be
The binding energies per nucleon of and are 5.6 MeV and 7.06 MeV respectively, then the energy of the reaction will be
Which of the following is true for a sample of isotope containing 
and 
Which of the following is true for a sample of isotope containing and
When a hydrogen atom emits a photon in going from n =5 to n = 1, its recoil speed is almost
When a hydrogen atom emits a photon in going from n =5 to n = 1, its recoil speed is almost
Statement 1: Density of all the nuclei is same
Statement 2: Radius of nucleus is directly proportional to the cube root of mass number
Statement 1: Density of all the nuclei is same
Statement 2: Radius of nucleus is directly proportional to the cube root of mass number
Statement 1: The mass of a nucleus can be either less than or more than the sum of the masses of nucleons present in it
Statement 2: The whole mass of the atom is considered in the nucleus
Statement 1: The mass of a nucleus can be either less than or more than the sum of the masses of nucleons present in it
Statement 2: The whole mass of the atom is considered in the nucleus
Statement 1: Hydrogen atom consists of only one electron but its emission spectrum has many lines
Statement 2: Only Lyman series is found in the absorption spectrum of hydrogen atom whereas in the emission spectrum, all the series are found
Statement 1: Hydrogen atom consists of only one electron but its emission spectrum has many lines
Statement 2: Only Lyman series is found in the absorption spectrum of hydrogen atom whereas in the emission spectrum, all the series are found
Statement 1: The ionizing power of 
particle is less compared to 
particles but their penetrating power is more
Statement 2: The mass of particle is less than the mass of particle
Statement 1: The ionizing power of particle is less compared to particles but their penetrating power is more
Statement 2: The mass of particle is less than the mass of particle
Statement 1: For the scattering of particles at large angles, only the nucleus of the atom is responsible
Statement 2: Nucleus is very heavy in comparison to electrons
Statement 1: For the scattering of particles at large angles, only the nucleus of the atom is responsible
Statement 2: Nucleus is very heavy in comparison to electrons
Statement 1: Isobars are the element having same mass number but different atomic number
Statement 2: Neutrons and protons are present inside nucleus
Statement 1: Isobars are the element having same mass number but different atomic number
Statement 2: Neutrons and protons are present inside nucleus
Statement 1: The mass of particles when they are emitted is higher than the mass of electrons obtained by other mean
Statement 2: particle and electron, both are similar particles
Statement 1: The mass of particles when they are emitted is higher than the mass of electrons obtained by other mean
Statement 2: particle and electron, both are similar particles
Statement 1: Electron capture occurs more often than positron emission in heavy elements
Statement 2: Heavy elements exhibit radioactivity
Statement 1: Electron capture occurs more often than positron emission in heavy elements
Statement 2: Heavy elements exhibit radioactivity
Statement 1: 
from the radioactive fall out from a nuclear bomb ends up in the bones of human beings through the milk consumed by them. It causes impairment of the production of red blood cells
Statement 2: The energy particle emitted in the decay of 
damage to bone marrow
Statement 1: from the radioactive fall out from a nuclear bomb ends up in the bones of human beings through the milk consumed by them. It causes impairment of the production of red blood cells
Statement 2: The energy particle emitted in the decay of damage to bone marrow
Statement 1: from the radioactive fall out from a nuclear bomb ends up in the bones of human beings through the milk consumed by them. It causes impairment of the production of red blood cells.
Statement 2: The energetic particles emitted in the decay of damage the bone marrow.
Statement 1: from the radioactive fall out from a nuclear bomb ends up in the bones of human beings through the milk consumed by them. It causes impairment of the production of red blood cells.
Statement 2: The energetic particles emitted in the decay of damage the bone marrow.
Statement 1: Half-life of a certain radioactive element is 100 days. After 200 days, fraction left undecayed will be 50%
Statement 2: 
, where symbols have usual meaning.
Statement 1: Half-life of a certain radioactive element is 100 days. After 200 days, fraction left undecayed will be 50%
Statement 2: , where symbols have usual meaning.
Statement 1: According to classical theory, the proposed path of an electron in Rutherford atom model will be parabolic
Statement 2: According to electromagnetic theory an accelerated particle continuously emits radiation
Statement 1: According to classical theory, the proposed path of an electron in Rutherford atom model will be parabolic
Statement 2: According to electromagnetic theory an accelerated particle continuously emits radiation
