Chapter 1 - Lesson 1 Quiz

What is meant by the specific heat of copper is 0.385 J/g.°C ?

Answer explanation

This means that the quantity of heat required to raise the temperature of 1 g of copper by 1°C equals 0.385 J 

When the system loses an amount of energy, the surrounding acquires it, and vice versa, So:

Answer explanation

E _system = -  E _surrounding

Any change in the system's energy E _system is accompanied by a change in the surrounding energy E _surrounding by a similar value, but with an opposite sign, so that the total energy remains constant. 

What is the first law of thermodynamics?

Answer explanation

·     First law of thermodynamics includes the study of the energy exchange in the isolated systems, First law of thermodynamics states that the total energy of an isolated system is constant even if the system is changed from one state to another. 

What are the types of systems based on their ability to exchange energy or matter with the surrounding?

Answer explanation

What is the system and surrounding in the context of thermodynamics?

Answer explanation

What is the law of conservation of energy?

Answer explanation

, which states that the energy in any physical or chemical change can be neither created nor destroyed, but it is transformed from one form to another. 

Calculate the specific heat of water in J/kg. °C

Answer explanation

6 kg sample of sand with initial temperature 20°C gained a quantity of heat equals 65000 J, Calculate the final temperature of the sample, knowing that the specific heat of the sand is 840 J/kg.°C

Answer explanation

Calculate the temperature of a mixture formed of 100 g of water its temperature is 25°C and 200 g of water its temperature is 37°C, assuming that the lost quantity of heat equals the absorbed quantity of heat.

Answer explanation