NG1S242 (Quiz 3)

The first law of thermodynamics is related to the conservation of which quantity?

• Force

• Energy

• Momentum

• Mass

According to the first law of thermodynamics, the energy can't be:

• destroyed only

• created only

• converted from one form to another

• created nor destroyed

By first law of thermodynamics for a closed system,

• all of the mentioned

• none of the mentioned

• constant volume process

•  constant temperature process

• adiabatic process

• constant pressure process

• constant volume process

• constant temperature process

• adiabatic process

• constant pressure process

• True

• False

Which statement is true about energy conversion?

• One form of energy cannot be converted into another form of energy

• Heat can be converted to other forms of energy only if temperature of the system changes

• There is no relationship between heat and work

• Heat can be converted into other forms of energy

If the internal energy and the work done by a system decreases by same amount then,

• The temperature must decrease

• The process must be adiabatic

• none of the mentioned

• all of the mentioned

Hot coffee in a insulated flask is shaken vigorously, considering it as a system which of the statement is not true?

• Heat energy has been added to coffee

• Temperature of the system rises

• Internal energy of the coffee increased

• Work is done on the system

A system has 30 J of heat added to it and in doing so, it does 25 J of work.  The change in internal energy will be:

• 25 J

• 5 J

• -5 J

• 30