Which law states that the volume of a given amount of gas is proportional to temperature when pressure and number of moles remain constant? a. boyle’s law b. charles’s law c. gay-lussac’s law d. combined gas law e. ideal gas law

charles law

Explanation:

v1 x T1 = v2 x T2

V proportional to T

B. Charles’s law

Explanation:

Charles' Law: This law states that volume is directly proportional to the temperature of the gas at constant pressure and number of moles.

    (At constant pressure and number of moles)

where,

= initial volume of gas  

= final volume of gas

= initial temperature of gas

= final temperature of gas

Therefore, the volume of gas is proportional to temperature when pressure and number of moles are constant.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.