Engineering Thermodynamics The polytropic index (n) is given by log (p2/ p1)/log (v1/ v2) log (p1p2)/log (v1v2) log [(p1v1)/(p2v2)] log (v1/ v2)/ log (p1/p2) log (p2/ p1)/log (v1/ v2) log (p1p2)/log (v1v2) log [(p1v1)/(p2v2)] log (v1/ v2)/ log (p1/p2) ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics When the gas is cooled at constant pressure, Its temperature increases but volume decreases Both temperature and volume decreases Both temperature and volume increases Its volume increases but temperature decreases Its temperature increases but volume decreases Both temperature and volume decreases Both temperature and volume increases Its volume increases but temperature decreases ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The efficiency of the Carnot cycle may be increased by Increasing the highest temperature Increasing the lowest temperature Keeping the lowest temperature constant Decreasing the highest temperature Increasing the highest temperature Increasing the lowest temperature Keeping the lowest temperature constant Decreasing the highest temperature ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The heat supplied to the gas at constant volume is (where m = Mass of gas, cv = Specific heat at constant volume, cp = Specific heat at constant pressure, T2 - T1 = Rise in temperature, and R = Gas constant) mcp (T2 + T1) mcv (T2 - T1) mcp (T2 - T1) mR (T2 - T1) mcp (T2 + T1) mcv (T2 - T1) mcp (T2 - T1) mR (T2 - T1) ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The condition of perfect vacuum, i.e., absolute zero pressure can be attained at A temperature of - 273.16°C A temperature of 273 °K A temperature of 0°C A negative pressure and 0°C temperature A temperature of - 273.16°C A temperature of 273 °K A temperature of 0°C A negative pressure and 0°C temperature ANSWER DOWNLOAD EXAMIANS APP
Engineering Thermodynamics The statement that molecular weights of all gases occupy the same volume is known as Dalton's law Law of thermodynamics Avogadro's hypothesis Gas law Dalton's law Law of thermodynamics Avogadro's hypothesis Gas law ANSWER DOWNLOAD EXAMIANS APP
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