First Law Of Thermodynamics
High-Yield Trend
Questions 5 MCQs
The internal energy change in a system that has absorbed kcal of heat and done J of work is:
1. J
2. J
3. J
4. J
If and represent the increase in internal energy and work done by the system respectively in a thermodynamical process, which of the following is true?
| 1. | , in an adiabatic process |
| 2. | , in an isothermal process |
| 3. | , in an adiabatic process |
| 4. | , in an isothermal process |
During an isothermal expansion, a confined ideal gas does of work against its surrounding. This implies that:
| 1. | of heat has been added to the gas. |
| 2. | no heat is transferred because the process is isothermal. |
| 3. | of heat has been added to the gas. |
| 4. | of heat has been removed from the gas. |
A gas is allowed to expand in a well-insulated container against a constant external pressure of 2.5atm from an initial volume of 2.50 L to a final volume of 4.50L. The change in internal energy U of the gas in joules will be:
| 1. | –500J | 2. | –505J |
| 3. | –506J | 4. | –508J |
A sample of g of water at and normal pressure ( N m–2) requires cal of heat energy to convert it into steam at . If the volume of the steam produced is cc, then the change in internal energy of the sample will be:
| 1. | J | 2. | J |
| 3. | J | 4. | J |